Seamless/Welded Carbon Steel Pipe Constructional Steel

Model NO.
All can be customized
Special Use
High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel
Structural Steel Bar
Wall Thickness
Transport Package
Customized Available
Diameter&Length customized available
HS Code
We've got a really efficient group to deal with inquiries from prospects. Our purpose is "100% customer fulfillment by our product excellent, price & our group service" and enjoy a superb track record amid clientele. With many factories, we can easily deliver a wide selection of Seamless/Welded Carbon Steel Pipe Constructional Steel, The product will supply to all over the world, such as: Lesotho, Pakistan, Lyon, With its rich manufacturing experience, high-quality products, and perfect after-sale service, the company has gained good reputation and has become one of the famous enterprise specialized in manufacturing series.We sincerely hope to establish business relation with you and pursue mutual benefit.
QINGHE SANJU TRADING CO., LTD. Diamond / Audited Supplier

Process: Cold Drawn, Cold Rolled, Hot Rolled, ERW, SSAW, LSAW
Size: SMLS (1/4″~30″); ERW (8″~24″); LSAW (16″~64″); SSAW(8″~100″).
Length: 6 meters or 12 meters or as requirement.
Product Steel Grade Standard Size Application
Boiler Tube SA106B, SA106C, 
SA210A1, SA210C
ASME SA106, ASME SA179, ASME SA192, ASME SA210 φ10-1067mm For manufacturing water cooled wall panel, economizer, reheater, superheater and steam pipeline of boilers in the industry of petrochemical and power.
T1, T1a, T1b ASME SA209 φ10-219mm
T5, T9, T11, T12, T22, T23, T91, T92 ASME SA213 φ19-127mm
P5, P9, P11, P12, P22, P23, P91, P92 ASME SA335 φ60.3-1067mm
ST35.8, ST45.8, 15Mo3, 13CrMo44, 10CrMo910, X20CrMoV121 DIN17175 φ6.35-1067mm
P195GH, P235GH, P265GH, 16Mo3, 13CrMo4-5,10CrMo9-10 EN10216-2 φ10-1067mm
304/304L, 316/316L, 310S, 321, 347/347H ASME SA213, ASME SA249 φ4-159mm
Line Pipe L175/A25, L210/A, L245/B, L290/X42, L320/X46, L360/X52, L390/X56, L415/X60, L450/X65, L485/X70 GB/T 9711,
API Spec 5L PSL1
1/2″-42″ For conveying gas, water, and oil either in the oil or natural gas industries.
L245N/BN, L245Q/BQ, L290N/X42N, L290Q/X42Q, L320N/X46N, L320Q/X46Q, L360N/X52N, L360Q/X52Q, L390N/X56N, L390Q/X56Q, L415N/X60N, X415Q/X60Q, L450Q/X65Q, L485Q/X70Q, L555Q/X80Q GB/T 9711,
API Spec 5L PSL2
Seamless steel tube for low temperature service Grade 1, Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 10 ASTM A333, 
1/2″-42″ For -45ºC-100ºClow temperature pressure vessel piping.
Tubing and Casing H40, J55, K55, M65, N80-1, N80Q, R95, L80, L80-Cr, C90, T95, C110, P110, Q125 API Spec 5CT Tubing: 
1.9″-4 1/2″
4 1/2″-20″
Tubing is used for extracting oil and gas from wells, while casing for sidewall.
Drill pipe E75, X95, G105, S135 API Spec 5DP 2 3/8″-6 5/8″ For well drilling
Seamless steel tube for mechanical engineering and structural use 1008, 1010, 1018, 1020, 1026, 1030, 1045, 1053, 1518, 1524, 1541, 4130, 4140, 4340, 8620 ASTM A519 φ16-1067mm For hydraulic equipment, mechanical structure.
S235JRH, S275J0H,S275J2H, S275NH/NLH, S355J0H, S355J2H, S355K2, S355NH/NLH, S420NH/NLH, S460NH/NLH EN10210-1 φ16-1067mm
E235, E275, E315, E355, E275K2, E355K2, 30CrMo4, 34CrMo4, 42CrMo4  EN10297-1 φ16-1067mm
Seamless steel tube for gas cylinder 37Mn, 34Mn2V, 30CrMo, 35CrMo, 34CrMo4, 30CrMnSiA GB18248 φ19-914mm For manufacturing gas cylinder
4130, 4140, 4142, 4145 ASTM A519 φ19-914mm
30CrMo4, 34CrMo4, 42CrMo4 EN10297-1 φ19-914mm
Precision steel tube St35, St37, St37.4, St45, St52.4 DIN2391 φ4-370mm For automobile, hydraulic equipment, etc.
E155, E195, E215, E220, E235, E275, E355 EN10305-1 φ4-370mm
E155, E195, E215, E220, E235, E275, E355 EN10305-4 φ4-90mm
Piston rod CK45, HY4520, HY4700, 42CrMo, 40Cr, 20MnV6   Φ6-1000mm Cylinder, shock absorber, printing machinery guide rod,etc