GB/T 9125.1-2020 (English Version) PDF

Scope: This part of GB/T9125 specifies the structural type, dimensions and tolerances, materials, manufacturing and heat treatment, inspection and acceptance, product quality certificate, marking and marking, protection and packaging of fasteners for flange connections of PN series steel pipes requirements. This section applies to the fasteners for steel pipe flange connections specified in GB/T9124.1 (including hexagonal head bolts, equal-length double-headed studs, fully threaded studs and nuts).

GB/T 9125.1-2020 Referenced Document

GB/T 1220 Stainless steel bars
GB/T 1221 Heat-resistant steel bars
GB/T 196 General purpose metric screw threads--Basic dimensions
GB/T 197 General purpose metric screw threads—Tolerances
GB/T 2 Fasteners.Ends of parts with external thread
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature*， 2021-12-31 Update
GB/T 3077 Alloy structure steels
GB/T 3098.1 Mechanical properties of fasteners.Blots, screws and studs
GB/T 3098.15 Mechanical properties of fasteners—Stainless steel nuts*， 2023-05-23 Update
GB/T 3098.2 Mechanical properties of fasteners.Nuts
GB/T 3098.6 Mechanical properties of fasteners—Stainless steel bolts，screws and studs*， 2023-05-23 Update
GB/T 3103.1 Tolerances for fasteners--Bolts,screws,studs and nuts
GB/T 5276 Fasteners.Bolts, screws, studs and nuts.Symbols and descriptions of dimensions
GB/T 5779.1 Fasteners-Surface discontinuities-Bolts,screws and studs for general requirements
GB/T 5779.2 Fasteners-Surface discontinuities-Nuts
GB/T 5782 Hexagon head bolts
GB/T 5785 Hexagon head bolts.Fine pitch thread
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 90.1 Fasteners—Acceptance inspection*， 2023-05-23 Update
GB/T 901 Double end studs (clamping type)--Product grade B

2020 GB/T 9125.1-2020 Fasteners for steel pipe flange joints—Part 1:PN designated
2011 GB/T 9125-2010 Fasteners for pipe flange joints
2003 GB/T 9125-2003 Fasteners for pipe flange jojnts