http://www.ec21.com/ec-market/astm a500 grade b steel pipe.html http://amchina01.en.ec21.com/Carbon_Steel_Pipes--2539378_3820515.htmlSteel grade A53 Gr A, A53 Gr B, A53 Gr C, A53 Gr D, ASTM 106B, 106C, 1010, 1020, 1035, 1045, STK400, STK490, STK500, S20100106 http://happly123.en.ec21.com/Sell_ASTM_A179_Carbon_Steel--3485203_3485216.htmlASTM/ASME A53 GRADE A&B A106 GRADE A,B&C A178 GRADE A,C&D; A179 LOW CARBON STEEL A192 LOW CARBON STEEL20100108 http://jindingpipe.en.ec21.com/ERW_Steel_Pipe--3590815_3590792.htmlASTM A53, ASTM A252, ASTM A500, BS1387 Steel Grade: A, B, X42, X46, X52, X56, X60, X65 X70 PSL1 PSL2 Standard: API 520100108 http://rktube.en.ec21.com/ERW_SSAW_LSAW_Steel_Pipe--3489359_3489447.htmlSteel Pipe Standard: API 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, BS1387 ERW Steel Pipe Grade: A, B, X42, X46, X5220100104 http://yong2788.en.ec21.com/ERW_LSAW_SSAW_Steel_Pipes--3300395_3444499.htmlSteel Pipe Standard: API 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, BS1387 ERW Steel Pipe Grade: A, B, X42, X46, X5220100104 http://shanghaixinlin.en.ec21.com/Hss--3153989_3154356.html Product: Square Pipe OD: 1/2" 20" W.T. 0.039" 0.591" Steel Grade Gr.A/B Standards ASTM A500,EN10219 Outerpack20091223 http://ytrkjm.en.ec21.com/ERW_SSAW_LSAW_Steel_Pipe--3519993_3519994.htmlSteel Pipe Standard: API 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, BS1387 ERW Steel Pipe Grade: A, B, X42, X46, X5220091125 http://steelpipe8100.en.ec21.com/ASTM_A500_Welded_Steel_Pipe--3736677_3736941.html Detailed Product Description 1) Standard: ASTM A500, API 5L, A53 2) Grade: x42, Gr. B, GR.A 3) Size: From 220091103 http://goldlionpipe.en.ec21.com/Supply_Excellent_Quality_of_SSAW--3850845_3851052.htmlASTM A53, A120, A135, A252, A500; BS1387-1985, GB/T9711 ,3091 Grade: A25,A25P, A, B, X42,GR.2, GR.3,etc. Applicatio20091007 http://jshuacheng.en.ec21.com/Sell_Seamless_Steel_Tube--3355887_3355888.htmlASTM/ASME A53 GRADE A&B A106 GRADE A,B&C A178 GRADE A,C&D; A179 LOW CARBON STEEL A192 LOW C20090725 http://metalsintl.en.ec21.com/Spiral_Welded_Pipe--1933219_1933429.htmlPipe (Grade B X42, X46, X52, X56, X60, X65, X70, X80) BS 3602 Steel Pipe and Tubes for Pressure Proposes Carbon Steel:20090707 http://seamlesspipes.en.ec21.com/Hot_Galvanized_Steel_Pipe--3557069_3630546.htmlB: Surface finish: black, blank, bright and galvanized C: Length of each pipe: 5000mm-12,000mm D: Steel grade: Q195 -20090626 http://rolexmetal.en.ec21.com/API_5L_X60_PSL2_Sour--2608939_3592336.html API 5L X60 PSL2 Sour Service DSAW / LSAW Line Pipes We are Stockholder & Distributors of ASTM A106 Grade B Seaml20090606 http://zhangying1002634.en.ec21.com/Erw_Steel_Pipe--3438581_3438670.htmlSteel Pipe Standard: API 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, BS1387 ERW Steel Pipe Grade: A, B, X42, X46, X5220090325 http://hssteelbiz.en.ec21.com/Welded_Steel_Pipes_Tubes--1_3219925.htmlSteel Tubing 3.18 ~12.00 mm 0.5 ~ 0.9 mm ASTM A254, SAE J 5276 2B) Welded Stainless Steel Pipes & Tubes Diameter Wall20090226 http://mariacomeon.en.ec21.com/ERW_Pipe--3294064_3294076.htmlASTM A252, ASTM A500, BS1387Steel Grade: A, B, X42, X46,X52,X56,X60,X65,X70 ERW (Stretch Reduction) Steel Pipe Intro20090218 http://raymond339.en.ec21.com/Steel_Pipe--3427222_2816502.html A: Steel Pipe, Copper Pipe, Bronze Pipe, Steel Stainless Pipe? etc. B: Size Range: 1) Round pipe diameter: 16mm-610m20080927 http://hanresco.en.ec21.com/Steel_Pipe_Steel_Tube--145439_145440.htmlSteel Pipes for Pressure Services ASTM A 53,135 A/B, API 5L A/B, BS3601/3602, DIN 1626/1629/2442/2448 ISO 2604-2/3, IS20071115 http://metco.en.ec21.com/Welded_Steel_Pipes_and_Tubes--1_3277664.htmlSteel Pipes for Pressure Services ASTM A 53,135 A/B, API 5L A/B, BS3601/3602, DIN 1626/1629/2442/2448 ISO 2604-2/3, ISO20061031