GB/T 5625.1-1985
Replaced
GB/T 12459-2025
Active
National standards
GB/T 12459-2025 Steel buttwelding piping fittings—Types and parameters
GB/T 12459-2025 Steel buttwelding piping fittings—Types and parameters
Price:
$ 195
Basic Information
Standard Code:
GB/T 12459-2025
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Piping accessories
ICS Name:
Flanges, pipe joints, and connectors
Publish Date:
2025-10-31
Implement Date:
2026-05-01
Pages:
76 pages
Scope
This document specifies the types and designations of steel butt-welded pipe fittings with diameters ranging from DN 8 to DN 3400 (NPS 1/4 to NPS 136), the pressure design of the fittings, their dimensions, surface profiles, end bevels, tolerances, markings, and product quality certificates.
This document applies to steel butt-welded seamless and welded pipe fittings. For fittings made from other metal materials, this document can be used as a reference for their application.
Development Information
Replace the following standards
Referenced Standards
GB/T 9124.2-2019 Steel pipe flanges—Part 2:Class designated
GB/T 13401-1992 Steel plate butt-welding pipe fittings
GB/T 13401-2005 Steel plate butt-welding pipe fittings
GB/T 13401-2017 Steel buttwelding pipe fittings—Technical specification
GB/T 28708-2012 Specification for size selection of seamless and welded steel pipe used in piping engineering
GB/T 13401-2025 Steel buttwelding piping fittings—Technical specification
Related Standards
GB/T 5625.2-1985
Replaced
GB/T 5625.2-1985 Flared type tube fittings—Straight thread connector—Body
GB/T 5626.1-1985
Replaced
GB/T 5626.1-1985 Flared type tube fittings—Male connector—Assembly
GB/T 5626.2-1985
Replaced
GB/T 5626.2-1985 Flared type tube fittings—Male connector—Body
GB/T 5627.1-1985
Replaced
GB/T 5627.1-1985 Flared typed tube fittings—Straight thread long connector—Assembly
GB/T 5627.2-1985
Replaced