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Cold Drawn 3 inch Seamless Carbon Steel Pipe for Structure and Boilers 

1. Detail introduction of Kinds of Seamless Pipes: 
A. Seamless Steel pipe for Structural purposes 
Material: *0, *0, *5, *5, Q**5 (*6Mn) low alloy steel etc. 
Diameter: *****5× ***0mm 
Standard: GB/T ***2(neq JIS G ****-) 
Application: For general structure and mechanical structure 
B. Seamless steel pipe for low and medium pressure 
Material: *0, *0, Q**5, Q**5etc 
Diameter: *****5× ***0mm 
Standard: GB/T ***3(neq JIS G ****-) 
Application: Forliquid service 
C. Seamless steel pipe for low and medium pressure 
Material: *0, *0, Q**5etc 
Diameter: *****5× ***0mm 
Standard: GB ***7(neq ISO *****1). 
Application: For various structure low and medium pressure boiler 
D. Seamless steel pipe for high pressure boiler 
Material: *0G (ST*5.8/3), *5CrMoG, *2Cr1MoVG 
Outer Diameter: ******5× ***0mm 
Standard: GB ***0, ASTM A***-A**6, DIN****5, ISO *****2 
E. Seamless hot-roller steel pipe for hydraulic pillar service 
Material: *0, *5, *5, *7SiMn 
Diameter: *****5× ***0mm 
Standard: GB/T ****6, DIN ***9. 
F. Seamless steel pipe for petroleum cracking 
Material: *0, *0 
Outer Diameter: *****5× ***0mm 
Standard: GB ***8, ASTM A**1, A**0 
Application: Furnace tubes heat exchanger tubes and pipeline used in petroleum refinery 
G. High-pressure seamless steel pipe for chemical fertilizer equipments 
Material: *0, *0.*6Mn, *5CrMoG, etc 
Diameter: *****5× ***0mm 
Standard: GB ***9, ISO ***4( **0degree***0 degree, ****2N/mm2) 
Application: For chemical equipment and pipeline with working temperature of **0 - ***0 degree and working pressure of ****2N/mm2 
H. Seamless steel pipe for gas cylinder 
Material: *7Mn, *4Mn2V, *0CrMo, *5CrMo 
Diameter: ******3× **9mm 
Standard: GB****8(neq JIS G ***9) 
I. Line Pipe 
Material: API GrA, B, X*2, X*6, X*2 
Diameter: **4.****5× ***0mm 
Standard: API Spec 5L, 
Application: For pipe suitable for conveying gas, water, and oil in oil and natural gas industries 
J. Petroleum and natural gas industries tries line pipe-Technical condition Part 1: Grade A, B 
Material: L**0, L**5, L**0, L**0, L**0 
Diameter: **4.****5× ***0mm 
Standard: GB/T***1.1, GB/T***1.2, (ISO*****1.2; API Spec SL) 
L. Casing, tubing and drill pipe(plain-end) 
Material: J*5, N*0 
Diameter: **4.****5mm 
Standard: API Spec 5CT 
M. Seamless carbon steel pipe for high-temperature service 
Material: A, B, C 
Diameter: **4.****5× ***0mm 
Standard: ASME SA***6 
N. High precision cold-drawn(rolled)blank 
Material: *0, *0, *5, Q**5(*6Mn)low alloy steel, etc. 
Diameter: ******5× ***0mm 
Standard: According to the requriements 
2. Seamless Pipe Tolerance: 
Wall Thickness: Of customers' agreements(≤ ± 5%*-± 7%) 
Material for high precision cold-drawn seamless steel tubes(with wall thickness variation≤ ± 5%*-± 7%) 
3. Production Capacity: *0, **0Tons/ Month 
4. Delivery Terms: Within *5~*0 days