- Overview
- FAQ
Basic Info.
Product Description







Standard | API, ASTM, BS, DIN, GB, JIS | ||
Outside Diameter | 21.3-1420mm | ||
Wall Thickness | 2.11-300mm | ||
Dia Tolerance | Control with in the standard, OD:+-1%, WT:+-1% | ||
Materials | 10#,20#,45#,Q235,Q345,Q195,Q215,Q345C,Q345A | ||
ASTM A53A/A53B/ A178C/A106B API5L | |||
ST37,ST37-2,DIN 1629 ST35, ST45,DIN 17175 ST35.8,DIN 17175 19Mn5 | |||
16Mn,Q345B,T1,T2,T5,T9,T11,T12,T22,T91,T92,P1,P2,P5,P9,P11,P12,P22,P91,P92,15CrMO,Cr5Mo,10CrMo910 | |||
Gr.B,X42,X46,X52,X60,X65,X70,X80,X100 | |||
Inspection | ISO,BV,SGS,MTC | ||
Packing | Steel strip packed. Standard Export Seaworthy Package.Suit forall kinds of transport,or as required | ||
Application | Widely used in Structure, Accessorize,Construction, Fluid transportation,machinery parts,the stress parts of the automobile tractor parts and so on | ||
MOQ | 5 ton,sample order accepted | ||
Shipment time | Within 7-10 workdays after receiving deposit or L/C |


Normal pipe size | OD(mm) | Normal wall thickness(mm) | |||||||||||||
DN | inch | ASME | SCH10 | SCH20 | SCH30 | STD | SCH40 | SCH60 | XS | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 | XXS |
15 | 1/2 | 21.3 | 2.11 | 2.41 | 2.77 | 2.77 | 3.73 | 3.73 | 4.78 | 7.47 | |||||
20 | 3/4 | 26.7 | 2.11 | 2.41 | 2.87 | 2.87 | 3.91 | 3.91 | 5.56 | 7.82 | |||||
25 | 1 | 33.4 | 2.77 | 2.9 | 3.38 | 3.38 | 4.55 | 4.55 | 6.35 | 9.09 | |||||
32 | 1.25 | 42.2 | 2.77 | 2.97 | 3.56 | 3.56 | 4.85 | 4.85 | 6.35 | 9.7 | |||||
40 | 1.5 | 48.3 | 2.77 | 3.18 | 3.68 | 3.68 | 5.08 | 5.08 | 7.14 | 10.15 | |||||
50 | 2 | 60.3 | 2.77 | 3.18 | 3.91 | 3.91 | 5.54 | 5.54 | 8.74 | 11.07 | |||||
65 | 2.5 | 73 | 3.05 | 4.78 | 5.16 | 5.16 | 7.01 | 7.01 | 9.53 | 14.02 | |||||
80 | 3 | 88.9 | 3.05 | 4.78 | 5.49 | 5.49 | 7.62 | 7.62 | 11.13 | 15.25 | |||||
90 | 3.5 | 101.6 | 3.05 | 4.78 | 5.74 | 5.74 | 8.08 | 8.08 | |||||||
100 | 4 | 114.3 | 3.05 | 4.78 | 6.02 | 6.02 | 8.56 | 8.56 | 11.13 | 13.49 | 17.12 | ||||
125 | 5 | 141.3 | 3.4 | 6.55 | 6.55 | 9.53 | 9.53 | 12.7 | 15.88 | 19.05 | |||||
150 | 6 | 168.3 | 3.4 | 7.11 | 7.11 | 10.97 | 10.97 | 14.27 | 18.26 | 21.95 | |||||
200 | 8 | 219.1 | 3.76 | 6.35 | 7.04 | 8.18 | 8.18 | 10.31 | 12.7 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 |
250 | 10 | 273 | 4.19 | 6.35 | 7.8 | 9.27 | 9.27 | 12.7 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 18.58 | 25.4 |
300 | 12 | 323.8 | 4.57 | 6.35 | 8.38 | 9.53 | 10.31 | 14.27 | 12.7 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 25.4 |
350 | 14 | 355.6 | 6.35 | 7.92 | 9.53 | 9.53 | 11.13 | 15.09 | 12.7 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | |
400 | 16 | 406.4 | 6.35 | 7.92 | 9.53 | 9.53 | 12.7 | 16.66 | 12.7 | 21.44 | 26.19 | 30.96 | 36.53 | 40.19 | |
450 | 18 | 457.2 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 19.05 | 12.7 | 23.83 | 39.36 | 34.93 | 39.67 | 45.24 | |
500 | 20 | 508 | 6.35 | 9.53 | 12.7 | 9.53 | 15.09 | 20.62 | 12.7 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | |
550 | 22 | 558.8 | 6.35 | 9.53 | 12.7 | 9.53 | 22.23 | 12.7 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | ||
600 | 24 | 609.6 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 24.61 | 12.7 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | |
650 | 26 | 660.4 | 7.92 | 12.7 | 9.53 | 12.7 | |||||||||
700 | 28 | 711.2 | 7.92 | 12.7 | 15.88 | 9.53 | 12.7 | ||||||||
750 | 30 | 762 | 7.92 | 12.7 | 15.88 | 9.53 | 12.7 | ||||||||
800 | 32 | 812.8 | 7.92 | 12.7 | 15.88 | 9.53 | 17.48 | 12.7 | |||||||
850 | 34 | 863.6 | 7.92 | 12.7 | 15.88 | 9.53 | 17.48 | 12.7 | |||||||
900 | 36 | 914.4 | 7.92 | 12.7 | 15.88 | 9.53 | 19.05 | 12.7 |

According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking. According to the cross-sectional shape, seamless steel tubes are divided into two types: round and special-shaped, and special-shaped tubes have various complex shapes such as square, oval, triangular, hexagonal, melon-shaped, star-shaped, and finned tubes.
The maximum diameter is up to 900mm and the minimum diameter is 4mm.
According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes.
Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industry, boiler pipes, bearing pipes, and high-precisi



Q1: Do you provide samples? Is it free or extra?
A1: Yes, we can provide samples free of charge and the customer will pay the freight.
Q2: What if I don't have export experience ?
A2: We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3: How long is your lead time?
A3: If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4: How is your technical support?
A4: We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem
after delivery, we will offer you call anytime.
Q5:In case of any quality problem, will you give compensation ?
A5:YES! If the goods was proofed to have quality problem by picture/video/test report, we will discuss with the customer friendly and pay compensation by same amount money or cargo accordin