Standard Specification　 Grade Description ASTM A53 A,B Pipe or Genenal Purposes A135 A,B Pipe for Conveying Liquid, Gas or Vapor A178 A,C,D E.R.W, Boiler Tubes A214 - E.R.W. Heat-Exchanger & Condenser Tubes A252 1,2,3 Steel Pipe Piles A500 A,B,C Steel Tubes for Structural Purposes A513 - E.R.W Mechanical Tubing A589 TypeⅠ,Ⅱ,Ⅲ,Ⅳ Steel Water-Well Pipe API　 5L　　　　　　　　　 A Line Pipe　　　　　　　　　 B X42 X46 X52 X56 X60 X65 X70 X80 5CT　 H-40, J-55 Casing and Tubing　 K-55, N-80 BS 1139 - Metal Scaffolding 　 1387 L,M,H Steel Tubes for Suitable for Pipe Thread 　 1775 ERW 11,16,20 Steel Tubes for Mechanical, Structural and General Engineering Purpose 　 3601 ERW 320,360,410 Steel Pipe for Pressure Purpose ANSI C801 - Rigid Steel Conduit UL 6 - - JIS ( K S ) 　　　　　　　　　　　　 G352 (D3507) SGP (SPP) Steel Pipe for Ordinary Piping G 3454 (D3562) STPG (SPPS) Steel Pipe for Pressure Service G 3461 (D3563) STB (STBH) Steel Pipe for Boiler & Heat Exchanger G 3444 (D3566) STK (SPS) Steel Pipe for General Structural Purpose G3445 (D3517) STKM (STKM) Steel Pipe for Machines Structural Purpose G 3466 (D3586) STKR (SPSR) Steel Square Pipe for General Structural Purpose C 8305 (D8401) - Rigid Steel Conduit (D3583) (SPW) Arc Welded Carbon Steel Pipes (D 3589) (P1H, P1S) Polyethylene Coated Steel Pipe(PFP) (D3537) (SPPW) Galvanized pipe for Water Service (D 3619) (AP,PB, PC, PD) Polyethylene Powder Lining Steel Pipes for Water Works A 5525 (F4602) - Steel Pipe Piles (D 3626) (SPCR) Corrosion Resistance Welded Steel Pipes for Water Service

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