Standard classification: performance standard standard system: American standard (ASME/ASTM) shape classification: detailed description: suitable for stainless steel bolts for high temperature pressure vessels, valves, flanges and pipe fittings, and the mechanical properties are A2-50, A2-80, A4-50 and A4-80 requirements. The performance levels are: B8, B8M, B8T, B8C and Class 2 B8CL2, B8MCL2, B8CCL2, B8TCL2. Heat treatment method: solid solution treatment, solid solution treatment strain hardening treatment.
Standard classification: performance standard standard system: national standard (GB) shape classification: detailed description: this standard specifies the mechanical properties of bolts, screws and studs made of carbon steel and alloy steel and tested at ambient temperature of 10~35 ℃.
Standard classification: performance standard standard system: national standard (GB) shape classification: detailed description: this standard specifies the mechanical properties of nuts that guarantee the load value when testing at ambient temperature of 10~35 ℃.
Standard classification: performance standard standard system: national standard (GB) shape classification: detailed description: this standard specifies the mechanical properties of bolts, screws and studs made of austenitic, martensitic and ferritic corrosion resistant stainless steel and tested at ambient temperature of 15~25 ℃. Austenitic steel: A1 ~ A5 martensitic steel: C1 ~ C4 ferritic steel:
Standard classification: performance standard standard system: national standard (GB) shape classification: detailed description: this standard specifies the mechanical properties of nuts made of austenitic, martensitic and ferritic corrosion resistant stainless steel and tested at ambient temperature of 15~25 ℃. Austenitic steel: A1 ~ A5 martensitic steel: C1 ~ C4 ferritic steel:
Standard Classification: Performance Standard Standard System: American Standard (ASME/ASTM) Shape Classification: Detailed Description: Mechanical Performance Requirements for Alloy Steel Bolts Suitable for Pressure Vessels, Valves, Flanges and Pipe Fittings at Low Temperatures. Performance grade: L7, L43, L7M heat treatment method: quenching and tempering
Standard Classification: Performance Standard Standard System: National Standard (GB) Appearance Classification: Detailed Description: This part specifies the allowable steel grades and standards for steel used for pressure components of pressure vessels, the technical requirements for steel, the use range (temperature and pressure) and allowable stress of steel. This part is applicable to pressure vessels with design temperature of -253 ℃ ~ 800 ℃ and design pressure of not more than 35Mpa.
Standard classification: performance standard standard system: chemical (HG) shape classification: detailed description: this standard specifies the type, size, material, marking, technical requirements and use regulations of fasteners for steel pipe flanges (PN series). The standard type includes: hexagon head bolts, equal length double-headed studs, full thread studs and type I hexagon nuts and type II hexagon nuts. The material and mechanical properties of commercial grade fasteners shall meet the requirements of GB/T3098.1, GB/T3098.2, GB/T3098.6 and GB/T3098.15.
Standard classification: performance standard standard system: chemical (HG) shape classification: detailed description: this standard specifies the type, size, material, marking, technical requirements and use regulations of fasteners for steel pipe flanges (Class series). The standard type includes: hexagon head bolts, full thread studs and type I hexagon nuts and special nuts. The material and mechanical properties of commercial grade fasteners shall meet the requirements of GB/T3098.1, GB/T3098.2, GB/T3098.6 and GB/T3098.15.
Standard classification: performance standard standard system: enterprise standard (ZH) shape classification: detailed description: this standard is applicable to high-pressure pipes, pipe fittings and fasteners with medium of ammonia synthesis, alcohol synthesis, urea and other process gases, temperature of -20 ℃
Standard classification: performance standard standard system: petrochemical (SH) shape classification: detailed description: the standard is the petrochemical industry standard. The standard type includes: heavy hex head bolts, equal length studs, full thread studs and heavy hex nuts.
Standard classification: performance standard standard system: chemical (HG) shape classification: detailed description: this standard specifies the structural dimensions and technical requirements of large diameter stud for flange and manhole flange connection of pressure vessel equipment. There are BT type and BS type of double-headed stud. Stud surface phosphating treatment.