Valve Standards

What Is an ASME Pressure Class? An ASME pressure class is a standardized pressure-temperature rating category defined by ASME standards that specifies the maximum allowable working pressure for valves, flanges, and fittings at any operating temperature, based on the allowable stress of the body material at that temperature. The class designation — 150, 300, 600, […]

“`html What Is ASME B16.5? ASME B16.5 is an American Society of Mechanical Engineers standard that specifies dimensions, pressure-temperature ratings, materials, tolerances, marking, and testing requirements for pipe flanges and flanged fittings from NPS 1/2 through NPS 24 at Class 150 through Class 2500. It defines the bolt circle diameter, bolt hole pattern, flange outside

What Is ASME B16.10? ASME B16.10 is an American Society of Mechanical Engineers standard that specifies face-to-face and end-to-end dimensions for industrial valves — the critical installation length measurements that determine whether a valve from any manufacturer will fit the same piping space as any other valve of the same type, nominal size, and pressure

What Is ASME B16.34? ASME B16.34 is an American Society of Mechanical Engineers standard that defines pressure-temperature ratings, allowable stress limits, wall thickness design requirements, material classifications, inspection criteria, and testing requirements for industrial valves in flanged, threaded, and welding end configurations. It is the foundational pressure rating standard for industrial valves — the reference

What Is API 607? API 607 is an American Petroleum Institute standard that specifies fire testing requirements for quarter-turn valves and their actuators, defining the test procedure, fire exposure conditions, leakage acceptance criteria, post-fire operability requirements, and certification documentation that demonstrate a valve design’s ability to maintain pressure boundary integrity and limited seat leakage after

What Is the Difference Between API 6D and API 600? API 6D and API 600 are American Petroleum Institute product standards that govern different valve categories in different service environments — API 6D specifies design, testing, and documentation requirements for pipeline valves (ball, gate, plug, and check) used in oil and gas transmission systems, while

What Is API 598? API 598 is an American Petroleum Institute standard that specifies inspection and pressure testing requirements for industrial valves, defining the test procedures, test pressures, test durations, acceptance criteria, and documentation requirements that verify a valve’s pressure boundary integrity and sealing performance before it is approved for shipment and installation. It is

What Is API 602? API 602 is an American Petroleum Institute standard that specifies design, materials, dimensions, inspection, and testing requirements for compact steel gate, globe, and check valves in sizes NPS 4 and smaller. It applies primarily to forged steel and barstock machined construction — manufacturing methods that provide superior mechanical integrity and pressure

What Is API 600? API 600 is an American Petroleum Institute standard that specifies design, materials, dimensions, pressure-temperature ratings, inspection, and testing requirements for bolted-bonnet steel gate valves used in petroleum refining, petrochemical processing, and related industries. It ensures structural integrity, sealing reliability, and manufacturing consistency for large-diameter, high-pressure steel gate valves in process plant

What Is API 6D? API 6D is an American Petroleum Institute standard that specifies the design, manufacturing, testing, marking, and documentation requirements for pipeline valves used in oil and gas transmission and distribution systems. It covers ball, gate, plug, and check valves intended for installation in pipeline service, where pressure integrity, long-term reliability, and full-bore