DESIGN AND MANUFACTURING:
BS 1868: Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries.
ASME B 16.34: Valves-Flanged, Threaded, and Welding End.
B5-5352 (replaced by ISO 15761)
ISO 15761: Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries (Equivalente a API 602)
API 602: Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries (Equivalente a ISO 15761)
API 6D: Pipeline Valves. Pressure Test Specification.
API-594: Check Valves: Wafer, Wafer-Lug, and Double Flanged Type

TEST AND INSPECTION:
API 6D: Pipeline Valves. Pressure Test Specification.
API 598: Valve Inspection and Testing.
ISO 15848: Industrial Valves – Measurement, test and qualification procedures for fugitive emissions.

FLANGE DIMENSION:
ASME B 16.5: Pipe Flanges and Flanged Fittings.
ASME B16.47: large diameter steel flanges: nps 26 through nps 60
MSS SP 44: Steel pipeline flanges

WELDED OR THREADED EXTREMES:
ASME B16.25: Buttwelding ends
ASME B16.11: Forged fittings, socket-welding and threaded
ASME B1.20.1: Pipe threads general purpose

FACE TO FACE DIMENSIONS:
ASME B 16.10: Face-to-Face and End-to-End Dimensions of Valves.
API 6D: Pipeline Valves. Pressure Test Specification
API-594: Check Valves: Wafer, Wafer-Lug, and Double Flanged Type