High/Medium/Low-Pressure Boiler Tube

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【Sizes (O.D. x T)】from 6 x 1mm to **0 x *0mm 【Standard】GB ***0, ***7 DIN ****5 ASME SA**2, SA**6, SA**9, SA**0, SA**3, SA**6 Q/BQB **1 【Application】For manufacture of low/medium/high and higher pressure boilers, water cooling panels, coal-saving devices, repeaters, super-heaters and steam pipelines 【Tolerances on Dimensions】 Wall Thickness Tolerance Standard Outside Diameter Wall Thickness Tolerance dia (mm) S (mm) ≤**0 S≤2•Sn **5%, **0% 2•Sn4•Sn ±9% DIN****5 >**0 S≤0.*5da **5%，**0% Q/BQB**1 0.*5da0.*1da ±*0% GB***7 *- ***0 **2.5%, **5% >*0 ±*0% GB***0 *- <3.5 **5% (MAX*0.*8 mm) **0% (MIN*0.*2 mm) 3.***0 **5%, **0% >*0 ±*0% ASME SA**0 *- 2.**3.8 **5%, *0% >3.**4.6 **5%, *0% >4.6 **3%, *0% ASME SA**0 *- *- ±*2.5% Outside Diameter Tolerance Standard Outside Diameter(mm） Tolerance DIN****5 Q/BQB**1 ≤**0 ±0.*5% (min=0.5mm) >**0 ±0.*8% GB***7 ≤**9 0.***5 GB***0 ≤*0 ±0.5 (mm) >*0 ±1.0% ASME SA**0 ≤**1.6 *0.4 *0.8 (mm) >**1.****0.5 *0.4 *1.2 (mm) ASME SA**0 ≤*8.3 *0.4 *0.8 (mm) >*8.****4.3 ±0.8 (mm) >**4.3 *1.6 *0.8 (mm) 【Commonly Used Grades】 Standard Grade GB***7 *0, *0 DIN****5 Q/BQB**1 St*5.8, Sr*5.8, *5Mo3, *3CrMo*4, *0CrMo**0, *4MoV*3, *2Cr1MoV GB***0 *0G, *0MnG, *5MnG, *5MoG, *0MoG, *2CrMoG, *5CrMoG, *2Cr2MoG, *2Cr1MoVG, *2Cr2MoWVTiB ASMESA**2 SA**2 ASMESA**6 SA***-B, SA***-C ASMESA**6 SA***-C2 ASMESA**0 SA***-A1, SA***-C ASMESA**9 SA***-T1a ASMESA**3 SA***-T*2, SA***-T*2