Piping Standard Library

Process Piping

ASME B31.3 is the definitive process piping code published by the American Society of Mechanical Engineers. It establishes the rules for the design, materials, fabrication, examination, inspection, and testing of piping systems in refineries, chemical, pharmaceutical, and other processing plants. This standard is fundamental to plant engineering worldwide, ensuring that complex piping systems safely contain hazardous fluids and withstand diverse operating conditions.

Power Piping

ASME B31.1 governs the design, materials, fabrication, erection, examination, inspection, testing, operation, and maintenance of power piping — high-pressure, high-temperature systems in electric power generating stations, industrial and institutional plants, geothermal heating, and central heating/cooling. It is one of ASME’s most-referenced codes and is tied directly to the Boiler and Pressure Vessel Code (BPVC), Section I.

Pipeline Transportation Systems for Liquids and Slurries

ASME B31.4 is the primary code published by the American Society of Mechanical Engineers for the design, construction, operation, and maintenance of liquid and slurry pipeline systems. It establishes the foundational safety and engineering requirements for cross-country pipelines transporting crude oil, refined products, and other liquids. This standard is critical for ensuring the safe and reliable long-distance transport of hazardous and non-hazardous liquids while protecting the public and the environment.

Gas Transmission and Distribution Piping Systems

ASME B31.8 is the premier code published by the American Society of Mechanical Engineers for the design, construction, operation, and maintenance of gas transmission and distribution piping systems. It governs the safe transport of natural gas from gathering lines and compressor stations to the end consumer's meter. This standard is vital for public safety, managing the high-energy risks associated with pressurized combustible gases over long distances and through populated areas.

Hydrogen Piping and Pipelines

ASME B31.12 is the dedicated ASME code for piping and pipelines in gaseous and liquid hydrogen service. It layers hydrogen-specific requirements — material qualification against hydrogen embrittlement, tighter fracture control, and additional examination — on top of the familiar B31 pressure-design framework, so that systems carrying a small, leak-prone, embrittling molecule stay safe from production through distribution.

National Board Inspection Code (NB-23)

The National Board Inspection Code (NB-23) is the post-construction code for the installation, inspection, and repair or alteration of pressure-retaining items — boilers, pressure vessels, piping, and pressure-relief devices. Published by the National Board of Boiler and Pressure Vessel Inspectors, it is adopted into law by most US and Canadian jurisdictions and provides the legal framework and the "R" and "VR" stamp programs under which in-service repairs are authorized.

Welded and Seamless Wrought Steel Pipe

ASME B36.10M is the foundational global dimensional standard for welded and seamless wrought steel pipe. It establishes standardized Outside Diameters (OD), nominal wall thicknesses (Schedules), and calculated linear weights across the piping industry. Originally derived from Iron Pipe Standard (IPS) dimensions, B36.10M standardizes pipe geometry from **NPS 1/8 (DN 6)** up to **NPS 80 (DN 2000)**. It decouples pipe outer geometry from internal fluid flow requirements, ensuring absolute dimensional consistency and interchangeability among pipes, flanges, valves, and fittings across oil refineries, chemical plants, power stations, and pipeline networks worldwide.

Stainless Steel Pipe Dimensions

ASME B36.19M is the premier global dimensional standard for stainless steel and corrosion-resistant alloy wrought pipe. It supplements ASME B36.10M by standardizing nominal wall thicknesses specifically designated with the "S" suffix (Sch 5S, 10S, 40S, and 80S). Because stainless steels (such as 304/304L, 316/316L, and Duplex 2205) offer high intrinsic corrosion resistance, they eliminate the need for heavy corrosion allowances typical of carbon steel. B36.19M establishes lighter wall schedules that significantly minimize material weight and reduce raw material costs for expensive alloy systems while maintaining exact Outside Diameter (OD) parity with B36.10M to ensure complete fitting, valve, and flange interchangeability.