3 mm × 0.5 mm
Smallest330 bar adjusted
- Margin
- +130 bar
- Factor basis
- 1 @ 37°C
Instrument Tubing Reference
Instrument Tubing Design Reference
Screen 316/316L tubing by pressure, temperature and service, then review installation geometry, fittings, materials, cleanliness, test planning and traced bundles.
Pressure & temperature selector
Screen published tube ratings against design conditions. Unsafe fitting and gas-service combinations are excluded automatically.
34 suitable combinations
Showing the smallest six OD/wall combinations
3 mm × 0.7 mm
560 bar adjusted
- Margin
- +360 bar
- Factor basis
- 1 @ 37°C
1/8 in × 0.028 in
586.1 bar adjusted
- Margin
- +386.1 bar
- Factor basis
- 1 @ 37°C
6 mm × 1.0 mm
420 bar adjusted
- Margin
- +220 bar
- Factor basis
- 1 @ 37°C
6 mm × 1.5 mm
710 bar adjusted
- Margin
- +510 bar
- Factor basis
- 1 @ 37°C
1/4 in × 0.035 in
351.6 bar adjusted
- Margin
- +151.6 bar
- Factor basis
- 1 @ 37°C
Screening only. Final selection must use the lowest certified rating of every component and the applicable design code.
Filters
40 matching sizes
Published catalog combinations
Select up to four to compare
| Compare | Service | Details | |||||
|---|---|---|---|---|---|---|---|
3 mmMM | 0.5 mm | 2.00 | 330 | 0.021 | Restriction | ||
3 mmMM | 0.7 mm | 1.60 | 560 | 0.027 | Restriction | ||
1/8 inIN | 0.028 in | 1.75 | 586.1 | 0.043 | Gas compatible | ||
6 mmMM | 1.0 mm | 4.00 | 420 | 0.125 | Gas compatible | ||
6 mmMM | 1.5 mm | 3.00 | 710 | 0.169 | Gas compatible | ||
1/4 inIN | 0.035 in | 4.57 | 351.6 | 0.119 | Gas compatible | ||
1/4 inIN | 0.049 in | 3.86 | 517.1 | 0.156 | Gas compatible | ||
1/4 inIN | 0.065 in | 3.05 | 703.3 | 0.19 | Gas compatible | ||
8 mmMM | 1.0 mm | 6.00 | 310 | 0.175 | Gas compatible | ||
8 mmMM | 1.5 mm | 5.00 | 520 | 0.244 | Gas compatible | ||
3/8 inIN | 0.035 in | 7.75 | 227.5 | 0.189 | Gas compatible | ||
3/8 inIN | 0.049 in | 7.04 | 330.9 | 0.254 | Gas compatible | ||
3/8 inIN | 0.065 in | 6.22 | 448.2 | 0.32 | Gas compatible | ||
10 mmMM | 1.0 mm | 8.00 | 240 | 0.225 | Gas compatible | ||
10 mmMM | 1.5 mm | 7.00 | 400 | 0.319 | Gas compatible | ||
12 mmMM | 1.0 mm | 10.00 | 200 | 0.275 | Gas compatible | ||
12 mmMM | 1.5 mm | 9.00 | 330 | 0.394 | Gas compatible | ||
12 mmMM | 2.0 mm | 8.00 | 470 | 0.5 | Gas compatible | ||
1/2 inIN | 0.035 in | 10.92 | 179.3 | 0.259 | Restriction | ||
1/2 inIN | 0.049 in | 10.21 | 255.1 | 0.351 | Gas compatible | ||
1/2 inIN | 0.065 in | 9.40 | 351.6 | 0.449 | Gas compatible | ||
5/8 inIN | 0.065 in | 12.57 | 275.8 | 0.579 | Gas compatible | ||
16 mmMM | 1.0 mm | 14.00 | 140 | 0.375 | Restriction | ||
16 mmMM | 1.5 mm | 13.00 | 230 | 0.507 | Gas compatible | ||
16 mmMM | 2.0 mm | 12.00 | 330 | 0.651 | Gas compatible | ||
18 mmMM | 1.0 mm | 16.00 | 120 | 0.425 | Restriction | ||
18 mmMM | 1.5 mm | 15.00 | 200 | 0.619 | Gas compatible | ||
18 mmMM | 2.0 mm | 14.00 | 290 | 0.801 | Gas compatible | ||
3/4 inIN | 0.065 in | 15.75 | 227.5 | 0.708 | Gas compatible | ||
20 mmMM | 2.0 mm | 16.00 | 260 | 0.901 | Gas compatible | ||
22 mmMM | 2.0 mm | 18.00 | 230 | 1 | Gas compatible | ||
25 mmMM | 2.0 mm | 21.00 | 200 | 1.15 | Restriction | ||
25 mmMM | 2.5 mm | 20.00 | 260 | 1.41 | Gas compatible | ||
1 inIN | 0.083 in | 21.18 | 213.7 | 1.21 | Gas compatible | ||
1 1/4 inIN | 0.095 in | 26.92 | 193.1 | 1.766 | Restriction | ||
1 1/4 inIN | 0.120 in | 25.65 | 248.2 | 2.192 | Gas compatible | ||
1 1/2 inIN | 0.120 in | 32.00 | 206.8 | 2.667 | Restriction | ||
1 1/2 inIN | 0.134 in | 31.29 | 234.4 | 2.948 | Gas compatible | ||
2 inIN | 0.134 in | 43.99 | 172.4 | 4.025 | Restriction | ||
2 inIN | 0.188 in | 41.25 | 248.2 | 5.485 | Gas compatible |
3 mm × 0.5 mm
Metric330 bar
- ID
- 2.00 mm
- Weight
- 0.021 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 2.00 mm
- Flow area: 3.14 mm²
- Metal area: 3.93 mm²
- Installation
- Bend radius: 15 mm
- Straight at fitting: 19 mm
- Supports ≤ Not published
- Catalog identity
- SS-T3M-S-0,5M-6ME
- Fitting series: 3M0
- 316/316L seamless
- Published rating & weight
- 330 bar · 4,786 psig
- 33.00 MPa
- 0.021 kg/m · 0.014 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
3 mm × 0.7 mm
Metric560 bar
- ID
- 1.60 mm
- Weight
- 0.027 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 1.60 mm
- Flow area: 2.01 mm²
- Metal area: 5.06 mm²
- Installation
- Bend radius: 15 mm
- Straight at fitting: 19 mm
- Supports ≤ Not published
- Catalog identity
- SS-T3M-S-0,7M-6ME
- Fitting series: 3M0
- 316/316L seamless
- Published rating & weight
- 560 bar · 8,122 psig
- 56.00 MPa
- 0.027 kg/m · 0.018 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
1/8 in × 0.028 in
Fractional586.1 bar
- ID
- 1.75 mm
- Weight
- 0.043 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 1.75 mm
- Flow area: 2.41 mm²
- Metal area: 5.50 mm²
- Installation
- Bend radius: 9.5 mm
- Straight at fitting: 18.3 mm
- Supports ≤ Not published
- Catalog identity
- SS-T2-S-028-20
- Fitting series: 200
- 316/316L seamless
- Published rating & weight
- 586.1 bar · 8,500 psig
- 58.61 MPa
- 0.043 kg/m · 0.029 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
6 mm × 1.0 mm
Metric420 bar
- ID
- 4.00 mm
- Weight
- 0.125 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 4.00 mm
- Flow area: 12.57 mm²
- Metal area: 15.71 mm²
- Installation
- Bend radius: 15 mm
- Straight at fitting: 21 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T6M-S-1,0M-6ME
- Fitting series: 6M0
- 316/316L seamless
- Published rating & weight
- 420 bar · 6,092 psig
- 42.00 MPa
- 0.125 kg/m · 0.084 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
6 mm × 1.5 mm
Metric710 bar
- ID
- 3.00 mm
- Weight
- 0.169 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 3.00 mm
- Flow area: 7.07 mm²
- Metal area: 21.21 mm²
- Installation
- Bend radius: 15 mm
- Straight at fitting: 21 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T6M-S-1,5M-6ME
- Fitting series: 6M0
- 316/316L seamless
- Published rating & weight
- 710 bar · 10,298 psig
- 71.00 MPa
- 0.169 kg/m · 0.114 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1/4 in × 0.035 in
Fractional351.6 bar
- ID
- 4.57 mm
- Weight
- 0.119 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 4.57 mm
- Flow area: 16.42 mm²
- Metal area: 15.25 mm²
- Installation
- Bend radius: 14.3 mm
- Straight at fitting: 20.6 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T4-S-035-20
- Fitting series: 400
- 316/316L seamless
- Published rating & weight
- 351.6 bar · 5,100 psig
- 35.16 MPa
- 0.119 kg/m · 0.08 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1/4 in × 0.049 in
Fractional517.1 bar
- ID
- 3.86 mm
- Weight
- 0.156 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 3.86 mm
- Flow area: 11.71 mm²
- Metal area: 19.96 mm²
- Installation
- Bend radius: 14.3 mm
- Straight at fitting: 20.6 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T4-S-049-20
- Fitting series: 400
- 316/316L seamless
- Published rating & weight
- 517.1 bar · 7,500 psig
- 51.71 MPa
- 0.156 kg/m · 0.105 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1/4 in × 0.065 in
Fractional703.3 bar
- ID
- 3.05 mm
- Weight
- 0.19 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 3.05 mm
- Flow area: 7.30 mm²
- Metal area: 24.37 mm²
- Installation
- Bend radius: 14.3 mm
- Straight at fitting: 20.6 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T4-S-065-20
- Fitting series: 400
- 316/316L seamless
- Published rating & weight
- 703.3 bar · 10,200 psig
- 70.33 MPa
- 0.19 kg/m · 0.128 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
8 mm × 1.0 mm
Metric310 bar
- ID
- 6.00 mm
- Weight
- 0.175 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 6.00 mm
- Flow area: 28.27 mm²
- Metal area: 21.99 mm²
- Installation
- Bend radius: 24 mm
- Straight at fitting: 23 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T8M-S-1,0M-6ME
- Fitting series: 8M0
- 316/316L seamless
- Published rating & weight
- 310 bar · 4,496 psig
- 31.00 MPa
- 0.175 kg/m · 0.118 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
8 mm × 1.5 mm
Metric520 bar
- ID
- 5.00 mm
- Weight
- 0.244 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 5.00 mm
- Flow area: 19.63 mm²
- Metal area: 30.63 mm²
- Installation
- Bend radius: 24 mm
- Straight at fitting: 23 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T8M-S-1,5M-6ME
- Fitting series: 8M0
- 316/316L seamless
- Published rating & weight
- 520 bar · 7,542 psig
- 52.00 MPa
- 0.244 kg/m · 0.164 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
3/8 in × 0.035 in
Fractional227.5 bar
- ID
- 7.75 mm
- Weight
- 0.189 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 7.75 mm
- Flow area: 47.14 mm²
- Metal area: 24.12 mm²
- Installation
- Bend radius: 23.8 mm
- Straight at fitting: 23.8 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T6-S-035-20
- Fitting series: 600
- 316/316L seamless
- Published rating & weight
- 227.5 bar · 3,300 psig
- 22.75 MPa
- 0.189 kg/m · 0.127 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
3/8 in × 0.049 in
Fractional330.9 bar
- ID
- 7.04 mm
- Weight
- 0.254 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 7.04 mm
- Flow area: 38.88 mm²
- Metal area: 32.38 mm²
- Installation
- Bend radius: 23.8 mm
- Straight at fitting: 23.8 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T6-S-049-20
- Fitting series: 600
- 316/316L seamless
- Published rating & weight
- 330.9 bar · 4,800 psig
- 33.09 MPa
- 0.254 kg/m · 0.171 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
3/8 in × 0.065 in
Fractional448.2 bar
- ID
- 6.22 mm
- Weight
- 0.32 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 6.22 mm
- Flow area: 30.42 mm²
- Metal area: 40.84 mm²
- Installation
- Bend radius: 23.8 mm
- Straight at fitting: 23.8 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T6-S-065-20
- Fitting series: 600
- 316/316L seamless
- Published rating & weight
- 448.2 bar · 6,500 psig
- 44.82 MPa
- 0.32 kg/m · 0.215 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
10 mm × 1.0 mm
Metric240 bar
- ID
- 8.00 mm
- Weight
- 0.225 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 8.00 mm
- Flow area: 50.27 mm²
- Metal area: 28.27 mm²
- Installation
- Bend radius: 24 mm
- Straight at fitting: 25 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T10M-S-1,0M-6ME
- Fitting series: 10M0
- 316/316L seamless
- Published rating & weight
- 240 bar · 3,481 psig
- 24.00 MPa
- 0.225 kg/m · 0.151 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
10 mm × 1.5 mm
Metric400 bar
- ID
- 7.00 mm
- Weight
- 0.319 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 7.00 mm
- Flow area: 38.48 mm²
- Metal area: 40.06 mm²
- Installation
- Bend radius: 24 mm
- Straight at fitting: 25 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T10M-S-1,5M-6ME
- Fitting series: 10M0
- 316/316L seamless
- Published rating & weight
- 400 bar · 5,802 psig
- 40.00 MPa
- 0.319 kg/m · 0.214 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
12 mm × 1.0 mm
Metric200 bar
- ID
- 10.00 mm
- Weight
- 0.275 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 10.00 mm
- Flow area: 78.54 mm²
- Metal area: 34.56 mm²
- Installation
- Bend radius: 38 mm
- Straight at fitting: 31 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T12M-S-1,0M-6ME
- Fitting series: 12M0
- 316/316L seamless
- Published rating & weight
- 200 bar · 2,901 psig
- 20.00 MPa
- 0.275 kg/m · 0.185 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
12 mm × 1.5 mm
Metric330 bar
- ID
- 9.00 mm
- Weight
- 0.394 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 9.00 mm
- Flow area: 63.62 mm²
- Metal area: 49.48 mm²
- Installation
- Bend radius: 38 mm
- Straight at fitting: 31 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T12M-S-1,5M-6ME
- Fitting series: 12M0
- 316/316L seamless
- Published rating & weight
- 330 bar · 4,786 psig
- 33.00 MPa
- 0.394 kg/m · 0.265 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
12 mm × 2.0 mm
Metric470 bar
- ID
- 8.00 mm
- Weight
- 0.5 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 8.00 mm
- Flow area: 50.27 mm²
- Metal area: 62.83 mm²
- Installation
- Bend radius: 38 mm
- Straight at fitting: 31 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T12M-S-2,0M-6ME
- Fitting series: 12M0
- 316/316L seamless
- Published rating & weight
- 470 bar · 6,817 psig
- 47.00 MPa
- 0.5 kg/m · 0.336 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1/2 in × 0.035 in
Fractional179.3 bar
- ID
- 10.92 mm
- Weight
- 0.259 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 10.92 mm
- Flow area: 93.69 mm²
- Metal area: 32.99 mm²
- Installation
- Bend radius: 38.1 mm
- Straight at fitting: 30.2 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T8-S-035-20
- Fitting series: 810
- 316/316L seamless
- Published rating & weight
- 179.3 bar · 2,600 psig
- 17.93 MPa
- 0.259 kg/m · 0.174 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
1/2 in × 0.049 in
Fractional255.1 bar
- ID
- 10.21 mm
- Weight
- 0.351 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 10.21 mm
- Flow area: 81.89 mm²
- Metal area: 44.79 mm²
- Installation
- Bend radius: 38.1 mm
- Straight at fitting: 30.2 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T8-S-049-20
- Fitting series: 810
- 316/316L seamless
- Published rating & weight
- 255.1 bar · 3,700 psig
- 25.51 MPa
- 0.351 kg/m · 0.236 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1/2 in × 0.065 in
Fractional351.6 bar
- ID
- 9.40 mm
- Weight
- 0.449 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 9.40 mm
- Flow area: 69.37 mm²
- Metal area: 57.31 mm²
- Installation
- Bend radius: 38.1 mm
- Straight at fitting: 30.2 mm
- Supports ≤ 0.9 m
- Catalog identity
- SS-T8-S-065-20
- Fitting series: 810
- 316/316L seamless
- Published rating & weight
- 351.6 bar · 5,100 psig
- 35.16 MPa
- 0.449 kg/m · 0.302 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
5/8 in × 0.065 in
Fractional275.8 bar
- ID
- 12.57 mm
- Weight
- 0.579 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 12.57 mm
- Flow area: 124.16 mm²
- Metal area: 73.78 mm²
- Installation
- Bend radius: 38.1 mm
- Straight at fitting: 31.8 mm
- Supports ≤ 1.2 m
- Catalog identity
- SS-T10-S-065-20
- Fitting series: 1010
- 316/316L seamless
- Published rating & weight
- 275.8 bar · 4,000 psig
- 27.58 MPa
- 0.579 kg/m · 0.389 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
16 mm × 1.0 mm
Metric140 bar
- ID
- 14.00 mm
- Weight
- 0.375 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 14.00 mm
- Flow area: 153.94 mm²
- Metal area: 47.12 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T16M-S-1,0M-6ME
- Fitting series: 16M0
- 316/316L seamless
- Published rating & weight
- 140 bar · 2,031 psig
- 14.00 MPa
- 0.375 kg/m · 0.252 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
16 mm × 1.5 mm
Metric230 bar
- ID
- 13.00 mm
- Weight
- 0.507 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 13.00 mm
- Flow area: 132.73 mm²
- Metal area: 68.33 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T16M-S-1,5M-6ME
- Fitting series: 16M0
- 316/316L seamless
- Published rating & weight
- 230 bar · 3,336 psig
- 23.00 MPa
- 0.507 kg/m · 0.341 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
16 mm × 2.0 mm
Metric330 bar
- ID
- 12.00 mm
- Weight
- 0.651 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 12.00 mm
- Flow area: 113.10 mm²
- Metal area: 87.96 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T16M-S-2,0M-6ME
- Fitting series: 16M0
- 316/316L seamless
- Published rating & weight
- 330 bar · 4,786 psig
- 33.00 MPa
- 0.651 kg/m · 0.437 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
18 mm × 1.0 mm
Metric120 bar
- ID
- 16.00 mm
- Weight
- 0.425 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 16.00 mm
- Flow area: 201.06 mm²
- Metal area: 53.41 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T18M-S-1,0M-6ME
- Fitting series: 18M0
- 316/316L seamless
- Published rating & weight
- 120 bar · 1,740 psig
- 12.00 MPa
- 0.425 kg/m · 0.286 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
18 mm × 1.5 mm
Metric200 bar
- ID
- 15.00 mm
- Weight
- 0.619 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 15.00 mm
- Flow area: 176.71 mm²
- Metal area: 77.75 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T18M-S-1,5M-6ME
- Fitting series: 18M0
- 316/316L seamless
- Published rating & weight
- 200 bar · 2,901 psig
- 20.00 MPa
- 0.619 kg/m · 0.416 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
18 mm × 2.0 mm
Metric290 bar
- ID
- 14.00 mm
- Weight
- 0.801 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 14.00 mm
- Flow area: 153.94 mm²
- Metal area: 100.53 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T18M-S-2,0M-6ME
- Fitting series: 18M0
- 316/316L seamless
- Published rating & weight
- 290 bar · 4,206 psig
- 29.00 MPa
- 0.801 kg/m · 0.538 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
3/4 in × 0.065 in
Fractional227.5 bar
- ID
- 15.75 mm
- Weight
- 0.708 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 15.75 mm
- Flow area: 194.78 mm²
- Metal area: 90.24 mm²
- Installation
- Bend radius: 44.5 mm
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T12-S-065-20
- Fitting series: 1210
- 316/316L seamless
- Published rating & weight
- 227.5 bar · 3,300 psig
- 22.75 MPa
- 0.708 kg/m · 0.476 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
20 mm × 2.0 mm
Metric260 bar
- ID
- 16.00 mm
- Weight
- 0.901 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 16.00 mm
- Flow area: 201.06 mm²
- Metal area: 113.10 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T20M-S-2,0M-6ME
- Fitting series: 20M0
- 316/316L seamless
- Published rating & weight
- 260 bar · 3,771 psig
- 26.00 MPa
- 0.901 kg/m · 0.605 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
22 mm × 2.0 mm
Metric230 bar
- ID
- 18.00 mm
- Weight
- 1 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 18.00 mm
- Flow area: 254.47 mm²
- Metal area: 125.66 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.2 m
- Catalog identity
- SS-T22M-S-2,0M-6ME
- Fitting series: 22M0
- 316/316L seamless
- Published rating & weight
- 230 bar · 3,336 psig
- 23.00 MPa
- 1 kg/m · 0.672 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
25 mm × 2.0 mm
Metric200 bar
- ID
- 21.00 mm
- Weight
- 1.15 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 21.00 mm
- Flow area: 346.36 mm²
- Metal area: 144.51 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.5 m
- Catalog identity
- SS-T25M-S-2,0M-6ME
- Fitting series: 25M0
- 316/316L seamless
- Published rating & weight
- 200 bar · 2,901 psig
- 20.00 MPa
- 1.15 kg/m · 0.773 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for use with the referenced tube fitting.
25 mm × 2.5 mm
Metric260 bar
- ID
- 20.00 mm
- Weight
- 1.41 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 20.00 mm
- Flow area: 314.16 mm²
- Metal area: 176.71 mm²
- Installation
- Bend radius: Confirm tooling
- Straight at fitting: Not published
- Supports ≤ 1.5 m
- Catalog identity
- SS-T25M-S-2,5M-6ME
- Fitting series: 25M0
- 316/316L seamless
- Published rating & weight
- 260 bar · 3,771 psig
- 26.00 MPa
- 1.41 kg/m · 0.947 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1 in × 0.083 in
Fractional213.7 bar
- ID
- 21.18 mm
- Weight
- 1.21 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 21.18 mm
- Flow area: 352.44 mm²
- Metal area: 154.26 mm²
- Installation
- Bend radius: 101.6 mm
- Straight at fitting: 38.1 mm
- Supports ≤ 1.5 m
- Catalog identity
- SS-T16-S-083-20
- Fitting series: 1610
- 316/316L seamless
- Published rating & weight
- 213.7 bar · 3,100 psig
- 21.37 MPa
- 1.21 kg/m · 0.813 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1 1/4 in × 0.095 in
Fractional193.1 bar
- ID
- 26.92 mm
- Weight
- 1.766 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 26.92 mm
- Flow area: 569.34 mm²
- Metal area: 222.39 mm²
- Installation
- Bend radius: 127 mm
- Straight at fitting: 50.8 mm
- Supports ≤ 2.1 m
- Catalog identity
- SS-T20-S-095-20
- Fitting series: 2000
- 316/316L seamless
- Published rating & weight
- 193.1 bar · 2,800 psig
- 19.31 MPa
- 1.766 kg/m · 1.187 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
1 1/4 in × 0.120 in
Fractional248.2 bar
- ID
- 25.65 mm
- Weight
- 2.192 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 25.65 mm
- Flow area: 516.89 mm²
- Metal area: 274.84 mm²
- Installation
- Bend radius: 127 mm
- Straight at fitting: 50.8 mm
- Supports ≤ 2.1 m
- Catalog identity
- SS-T20-S-120-20
- Fitting series: 2000
- 316/316L seamless
- Published rating & weight
- 248.2 bar · 3,600 psig
- 24.82 MPa
- 2.192 kg/m · 1.473 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
1 1/2 in × 0.120 in
Fractional206.8 bar
- ID
- 32.00 mm
- Weight
- 2.667 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 32.00 mm
- Flow area: 804.45 mm²
- Metal area: 335.64 mm²
- Installation
- Bend radius: 152.4 mm
- Straight at fitting: 61.1 mm
- Supports ≤ 2.1 m
- Catalog identity
- SS-T24-S-120-20
- Fitting series: 2400
- 316/316L seamless
- Published rating & weight
- 206.8 bar · 3,000 psig
- 20.68 MPa
- 2.667 kg/m · 1.792 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
1 1/2 in × 0.134 in
Fractional234.4 bar
- ID
- 31.29 mm
- Weight
- 2.948 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 31.29 mm
- Flow area: 769.09 mm²
- Metal area: 371.00 mm²
- Installation
- Bend radius: 152.4 mm
- Straight at fitting: 61.1 mm
- Supports ≤ 2.1 m
- Catalog identity
- SS-T24-S-134-20
- Fitting series: 2400
- 316/316L seamless
- Published rating & weight
- 234.4 bar · 3,400 psig
- 23.44 MPa
- 2.948 kg/m · 1.981 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
2 in × 0.134 in
Fractional172.4 bar
- ID
- 43.99 mm
- Weight
- 4.025 kg/m
- Service
- Restricted
Engineering details
- Derived geometry
- ID: 43.99 mm
- Flow area: 1520.03 mm²
- Metal area: 506.80 mm²
- Installation
- Bend radius: 203.2 mm
- Straight at fitting: 82.5 mm
- Supports ≤ 2.1 m
- Catalog identity
- SS-T32-S-134-20
- Fitting series: 3200
- 316/316L seamless
- Published rating & weight
- 172.4 bar · 2,500 psig
- 17.24 MPa
- 4.025 kg/m · 2.705 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
Not recommended for gas service with the referenced tube fitting.
2 in × 0.188 in
Fractional248.2 bar
- ID
- 41.25 mm
- Weight
- 5.485 kg/m
- Service
- Gas ready
Engineering details
- Derived geometry
- ID: 41.25 mm
- Flow area: 1336.38 mm²
- Metal area: 690.45 mm²
- Installation
- Bend radius: 203.2 mm
- Straight at fitting: 82.5 mm
- Supports ≤ 2.1 m
- Catalog identity
- SS-T32-S-188-20
- Fitting series: 3200
- 316/316L seamless
- Published rating & weight
- 248.2 bar · 3,600 psig
- 24.82 MPa
- 5.485 kg/m · 3.686 lb/ft
- Hardness ≤ 90 HRB / 200 HV
Service check
No catalog exception is marked for this combination.
Installation & routing
Published tooling radii, fitting straight lengths and normal-service clamp spacing. Values are qualified by source—not interpolated.
Bend radius
Centerline radius depends on OD, wall, material and tooling.
Fitting straight
Leave enough straight tube for full fitting insertion.
Support spacing
Clamp both sides of bends; tighten spacing for vibration and heavy items.
| Series | Tube OD | Bend radius | Straight at fitting | Max support spacing |
|---|---|---|---|---|
| Fractional | 1/8 in | 9.5 mm | 18.3 mm | Not published |
| Fractional | 1/4 in | 14.3 mm | 20.6 mm | 0.9 m |
| Fractional | 3/8 in | 23.8 mm | 23.8 mm | 0.9 m |
| Fractional | 1/2 in | 38.1 mm | 30.2 mm | 0.9 m |
| Fractional | 5/8 in | 38.1 mm | 31.8 mm | 1.2 m |
| Fractional | 3/4 in | 44.5 mm | Not published | 1.2 m |
| Fractional | 1 in | 101.6 mm | 38.1 mm | 1.5 m |
| Fractional | 1 1/4 in | 127 mm | 50.8 mm | 2.1 m |
| Fractional | 1 1/2 in | 152.4 mm | 61.1 mm | 2.1 m |
| Fractional | 2 in | 203.2 mm | 82.5 mm | 2.1 m |
| Metric | 3 mm | 15 mm | 19 mm | Not published |
| Metric | 6 mm | 15 mm | 21 mm | 0.9 m |
| Metric | 8 mm | 24 mm | 23 mm | 0.9 m |
| Metric | 10 mm | 24 mm | 25 mm | 0.9 m |
| Metric | 12 mm | 38 mm | 31 mm | 0.9 m |
| Metric | 16 mm | Not published | Not published | 1.2 m |
| Metric | 18 mm | Not published | Not published | 1.2 m |
| Metric | 20 mm | Not published | Not published | 1.2 m |
| Metric | 22 mm | Not published | Not published | 1.2 m |
| Metric | 25 mm | Not published | Not published | 1.5 m |
Qualification: These are typical/source-published installation values, not universal minimums. Reduce support spacing around bends, tees, valves, vibration, pulsation, shock and concentrated loads.
Sources: MS-13-03 Rev J · Bulletin 4200-B4 October 2023
Tube fittings & adapters
Curated 1/4 in 316 stainless reference set for layout checks. Use the current manufacturer catalog for final ordering.
A overall/envelopeAx center-to-endD body envelopeE minimum nominal openingF wrench flat
| Configuration | Ends | Ordering no. | A | Ax | D | E | F | Catalog |
|---|---|---|---|---|---|---|---|---|
| Straight union1/4 in | Tube × tube | SS-400-6 | 1.61 in | — | 0.6 in | 0.19 in | — | p. 14 |
| 90° union elbow1/4 in | Tube × tube | SS-400-9 | 1.06 in | — | 0.6 in | 0.19 in | 0.5 in | p. 33 |
| Union tee1/4 in | Tube × tube × tube | SS-400-3 | 2.12 in | 1.06 in | 0.6 in | 0.19 in | 0.5 in | p. 40 |
| Male NPT connector1/4 in | 1/4 in male NPT | SS-400-1-4 | 1.49 in | — | 0.6 in | 0.19 in | 0.5625 in | p. 17 |
| Female NPT connector1/4 in | 1/4 in female NPT | SS-400-7-4 | 1.41 in | — | 0.6 in | 0.19 in | 0.75 in | p. 26 |
| Male NPT tube adapter1/4 in adapter stem | 1/4 in male NPT | SS-4-TA-1-4 | 1.46 in | — | — | 0.17 in | 0.5625 in | p. 50 |
Do not intermix or interchange ferrules, nuts, bodies or adapter stems from non-standardized fitting systems or different manufacturers.
Dimensions are manufacturer-specific. Source: MS-01-140 Rev AJ, Dimension tables, pp. 14, 17, 26, 33, 40 and 50.
Materials & cleanliness
Selection guidance is separated from the 316/316L pressure table so alternative alloys never inherit an unsupported rating.
Material options
304/304L stainless steel
S30400 / S30403
- Common specification
- ASTM A269 / A213
- Typical selection use
- General clean utility and mild process service.
- Key caution
- Lower chloride resistance than 316L; verify external corrosion exposure.
- Fitting basis
- Use matching qualified stainless fitting system.
316/316L stainless steel
S31600 / S31603
- Common specification
- ASTM A269 / A213
- Typical selection use
- General instrumentation, impulse and sample lines.
- Key caution
- Screen chloride pitting, crevice corrosion and chloride SCC.
- Fitting basis
- Current page pressure table uses the cited 316/316L tube/fitting basis.
Alloy 400
N04400
- Common specification
- ASTM B165
- Typical selection use
- Reducing acids, alkalis and selected marine service.
- Key caution
- Not a universal oxidizing-acid solution; verify galvanic pairing.
- Fitting basis
- Use a source-qualified alloy tube/fitting combination.
Alloy 625
N06625
- Common specification
- ASTM B444
- Typical selection use
- High-strength chloride and sour-service applications.
- Key caution
- Confirm NACE/ISO 15156 condition and product form when applicable.
- Fitting basis
- Use manufacturer-published alloy fitting and tubing ratings.
Alloy 825
N08825
- Common specification
- ASTM B423
- Typical selection use
- General, pitting and crevice-corrosion resistance in aggressive media.
- Key caution
- Compatibility depends on concentration, temperature and contaminants.
- Fitting basis
- Use a tested special-alloy combination; do not apply the 316 table.
Alloy 2507 super duplex
S32750
- Common specification
- ASTM A789
- Typical selection use
- High chloride resistance with higher mechanical strength.
- Key caution
- Bending and swaging tooling restrictions apply; control fabrication heat input.
- Fitting basis
- Use qualified 2507 fittings and manufacturer-specific tooling.
Surface finish & cleanliness
General instrumentation
- Basis
- Clean, dry, scratch-free tubing suitable for bending and ferrule sealing.
- Packaging
- Protect ends from dirt, water and mechanical damage through installation.
- Verification
- Material certificate and receiving inspection.
- • General cleanliness is not an oxygen- or UHP-service certification.
Oxygen-enriched service
- Basis
- Application-defined cleaning, inspection and cleanliness preservation per the project oxygen-safety program.
- Packaging
- Cap wetted openings; individually seal and label cleaned components until use.
- Verification
- Approved cleaning procedure, inspection/analysis records and cleanliness certificate.
- • Cleaning is an ignition-risk control, not proof that a component is oxygen-compatible.
- • The acceptable cleanliness level is application-specific; ASTM G93 does not prescribe one universal level.
High-purity / passivated
- Basis
- 316L tubing with controlled chemistry, cleaning/passivation and prepared ends where specified.
- Packaging
- Protected ends and sealed clean packaging; preserve traceability through fabrication.
- Verification
- MTR, certificate of conformance, surface-finish and dimensional records as specified.
- • Match fabrication, welding, purge and final-clean requirements to the process purity class.
Ultrahigh-purity electropolished
Internal Ra ≤ 0.25 µm
- Basis
- Electropolished 316L internal surface with source-published 0.25 µm Ra maximum.
- Packaging
- Ends capped; tubes individually double bagged, then bulk bagged in an ISO Class 4 clean room.
- Verification
- MTR and process-specific certificate of conformance; add surface and purity records where specified.
- • The 0.25 µm Ra value applies to the cited UHP product, not ordinary ASTM A269 tubing.
Corrosion & pressure-test planning
Decision checklists only. Final test pressure and acceptance criteria come from the governing code edition and project procedure.
Corrosion allowance is not a silent tubing derating
- • Use the specified tube wall and the published rating of the complete tube/fitting assembly.
- • Do not silently subtract a pipe-style corrosion allowance from a manufacturer-published tubing rating.
- • Where corrosion or erosion is credible, define material selection, minimum remaining wall, inspection method and interval.
- • Final acceptance must follow the governing code, project specification and component manufacturer.
Hydrostatic test checklist
- Confirm the governing code edition, project test specification and test boundary.
- Check the lowest-rated permanent and temporary component at the test temperature.
- Verify test-fluid compatibility, cleanliness, trapped-gas removal, drainage, drying and disposal.
- Use calibrated pressure instruments, defined hold/examination criteria and a signed test record.
Pneumatic test checklist
- Use pneumatic testing only when justified and permitted by the governing code/project procedure.
- Assess stored energy; establish exclusion zones, remote pressurization and staged pressure increases.
- Confirm gas compatibility, leak-detection method and safe depressurization/vent routing.
- Document authorization, calibrated instruments, examination results and restoration of the system.
Code scope reference: ASME B31.3-2024. Consult the licensed project copy for examination, inspection, test-pressure and safety requirements.
Tube bundles & heat tracing
Configuration screening for impulse, sample and process lines. Heat-loss and tracer-circuit design remain project-specific.
Pre-insulated, untraced
Heat-loss reduction and mechanical protection where active tracing is not required.
- Tube range
- 1/8–3/4 in; 6–12 mm
- Routing radius
- ≥ 203 mm
- Materials
- 316/316L stainless steel, copper or PFA by configuration
- Jacket
- PVC: installation above −23°C; urethane: installation to −40°C
- Temperature basis
- Confirm process, insulation and jacket limits for the selected configuration.
- Area / installation check
- No electrical approval required; installation still follows area and fire requirements.
Electric-traced bundle
Freeze protection and controlled process-temperature maintenance.
- Tube range
- 1/8–3/4 in; 6–12 mm
- Routing radius
- ≥ 203 mm
- Materials
- 316/316L stainless steel, copper or PFA by configuration
- Jacket
- PVC or urethane; select tracer and jacket for minimum ambient.
- Temperature basis
- Tracer family, circuit length, power and control selection are configuration-specific.
- Area / installation check
- Use the exact tracer, termination kit and hazardous-area approval for the installation location.
Light steam-traced bundle
Freeze protection and moderate temperature maintenance using a separate steam tracer.
- Tube range
- 1/8–3/4 in; 6–12 mm
- Routing radius
- ≥ 203 mm
- Materials
- 316/316L stainless steel, copper or PFA by configuration
- Jacket
- PVC or urethane subject to ambient and surface-temperature limits.
- Temperature basis
- Confirm steam conditions, process target and jacket surface-temperature limit.
- Area / installation check
- Check steam supply/return design and area-specific hot-surface requirements.
Heavy steam-traced bundle
Higher process-temperature maintenance and viscosity control.
- Tube range
- 1/8–3/4 in; 6–12 mm
- Routing radius
- ≥ 203 mm
- Materials
- 316/316L stainless steel, copper or PFA by configuration
- Jacket
- Select insulation and jacket for the calculated heat balance.
- Temperature basis
- Typical cited use is 93–204°C process maintenance; verify the complete configured assembly.
- Area / installation check
- Review hot-surface, personnel-protection and steam-system requirements.
Confirm heat loss, tracer type and length, controls, electrical terminations or steam supply/return, end seals and current hazardous-area approvals. Source: MS-02-316 Rev H.
Data basis & traceability
Every displayed base rating is tied to a published catalog row—not a silently generated formula. Converted units and derived geometry are calculated from those source values.
- Material
- ASTM A213 / A269 Type 316/316L seamless, fully annealed
- Base temperature
- −28 to 37°C
- Allowable stress
- 137.8 MPa
- Verified
- 2026-07-20
- Code basis
- ASME B31.3 · ASME B31.1
- Code edition
- Not stated in the source catalog; verify against the project-governing edition
- Geometry
- ID = OD − 2t; areas use circular-section geometry
| 37°C | 93°C | 204°C | 315°C | 426°C | 537°C |
|---|---|---|---|---|---|
| × 1.00 | × 1.00 | × 0.96 | × 0.85 | × 0.79 | × 0.76 |
- Base ratings are manufacturer-published values for seamless Type 316/316L stainless steel tubing at −28 to 37°C.
- Elevated-temperature results use published 316/316L derating factors and the next higher listed temperature breakpoint for conservative screening.
- For welded-and-drawn tubing, apply 0.85 for double-welded tube and 0.80 for single-welded tube.
- The complete assembly rating is limited by its lowest-rated tube, fitting, valve, joint or end connection.
- Results are for preliminary screening; confirm the current manufacturer-certified rating and governing code before final design.