we could supply the seamless steel tube with the size range of OD5--720mmXWT0.5--70mm.and 7746specifications and in 191 grades including carbon steel,alloy steel,stainless steel .all the products are produced in accordance with applicable national and international standards,,they are widly used in such fields as petroleum industy,building structures and transportation.
Standard:GB/T8162/API5L/API5CT/ASME SA106/GB5310/ASTM A213/JIS G 3461

Seamless steel pipe
1.General used seamless steel pipe ASTM A53 GR.B,steel:SA53 B,
Size:1/4"-28",13.7-711.2mm.A53 GR.B ,TENSILE STRENGTH ≥ 415MPa YLELD POINT ≥ 240MPa
Main products:GRAD B 2.Standard:ASTM A 53 , used under 350C presure pipe line and generaly used pipe.
2.High pressure used boiler pipe ASTM A106 GR.B,steel:SA106B,Size:1/4"-28",13.7-711.2mm.steel:GR B ,standard:ASTM A106
TENSILE STRENGTH (MPa) ASTM A106 A106B ≥415 YLELD POINT≥240 CHEMICAL COMPOSITION(%) C Si Mn P S Cr Mo Cu Ni V> ASTM A106 A106B ≤0.30 ≥0.10 0.29-1.06 ≤0.035 ≤0.035 ≤0.40 ≤0.15 ≤0.40 ≤0.40 ≤0.08
3.ASTM A106/A53/API 5L GR.B,steel: B,size:1/4"-28",13.7-711.2mm
4.-40degree-101degree  low temperature ASTM A333,steel:GR.A,GR.1,GR.6,GR.7,GR.3,
Low temperature concussion test can offer.SIZE:1/4"-28"*SCH20\30\STD\60\80\100\120\140\160\XXS
5. DIN2448/1629 seamless steel pipe,steel:St37,St44,St52,size:1/4"-28",13.7-711.2mm
6. Refractory steel pipe DIN17175-1979
Steel:St35.8-St45.8/I,St35.8-St45.8/III, Alloy steel:15Mo3,13CrMo44,10CrMo910,Size:1/4"-28"*SCH20,SCH30,SCH40?SCH160,SCHXXS,13.7-711.2mm.
7.Structure used seamless steel pipe GB/T8162-1999,steel:10#,20#,35#,45#,16Mn(Q345),size:6-720*1-70mm
8.liquid transport seamless steel pipe GB/T8163-1999,steel:10#,20#,16Mn(Q345),Size:6-720*1-70mm
9.Low or Medium pressure boiler pipe GB3087-1999,steel:10#,20#, Size:6-720*1-70mm
10.High pressure boiler pipe GB5310-1995,steel:20G,size:6-720*1-70mm
11.DIN?391 hydraulic pressure seamless steel pipe (Chinese standard GB3639-83),OD10-68MM,WT1-10MM.
12.According to customer request we process hot expand steel pipe SIZE:114-830MM*6-45MM Standard or not standard big size steel pipe.