Length:4m-7m or customer request
Surface treatment:Black
Place of Origin:Tianjin,China
Application:Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Lead time:Within 7 days from stock with 6m length,20-25days for customized pipe according to the qty.
Transport Package:By bundles, plastic caps or steel caps,wooden cases or as requirement.
Dimensions of steel tubes: medium
Nominal size of thread (DN) Designation of thread Outside diameter(mm) Thickness(mm) Mass of black tube (kg/m)
max  min Plain end  Screwed and socketed
8  1/4 13.9 13.3 2.3 0.641 0.645
10  3/8 17.4 16.8 2.3 0.839 0.845
15  1/2 21.1 21.1 2.6 1.21 1.22
20  3/4 27.2 26.6 2.6 1.56 1.57
25  1    34.2 33.4 3.2 2.41 2.43
32 1 1/4 42.9 42.1 3.2 3.1 3.13
40 1 1/2 48.8 48.0 3.2 3.57 3.61
50  2    60.8 59.8 3.6 5.03 5.10
65 2 1/2 76.6 75.4 3.6 6.43 6.55
80  3    89.5 88.1 4.0 8.37 8.54
100  4    114.9 113.3 4.5 12.2 12.5
125  5 140.6 138.7 5.0 16.6 17.1
150 6 166.1 164.1 5.0 19.7 20.3

Chemical Requirements and mechanical properties of DN40 black BS1387 medium class steel pipe supplier

Chemical Composition(ladle) Mechanical Properties at room temperature
C (max) Mn (max) P (max) S (max) Tensile strength,Rm Yield strength,Re(min) Elongation on gauge length  Lo=5.65√SoA(min)
0.20% 1.20% 0.05% 0.05% 320 to 460 N/mm2 195 N/mm2 20%


1.Best price with good quality.
2.The partner you can trust.
3.Good service and very patient.
4.We are experienced manufacturer in Tianjin.
5.Special design avaliable according to requirements.
6.All production processes are under ISO 9001-2008 strictly.
7.Visit factory any time.
8.Choose DongPengBoDa is equal to Choose Top Guarantee!

Main Products:Galvanized steel pipe,Thinner wall pipe,Hollow section pipe,Conduit tube

Our Company:

   DongPengBoDa Steel Pipe Group is located in Daqiuzhuang, Tianjin, which is the biggest welded pipe production base in the world.
Group is founded in 2006, and the register capital is 205 million RMB. It has five subsidiary companies: Tianjin Tianfeng Steel Pipe Co., Ltd; Tianjin Tianwang Steel Pipe Co.,Ltd; Tianjin FWS Trading Co., Ltd; Dongpengboda (Tianjin) Industrial Co., Ltd; FIVE STEEL (TIANJIN) TECH CO., LTD. After years of hard work, we have formed a diversified investment pattern of development, and in accordance with the requirements of new industrialization, we have given full play to their own advantages to achieve the scale, structure, quality and efficiency overall promotion.
   Group companies have a professional production of galvanized round pipe, galvanized square and rectangular pipe, hot rolled square and rectangular steel pipe, steel conduit (EMT/IMC/RSC) and other various types of steel pipes. We have a total of 17 steel production lines, which have advanced technology and equipment and are all controlled by computer. Production process is in strict accordance with the ISO9001 quality management system, and steel pipe can be customized in GB, American standard, British standard, European standard, Australian standard and Japanese standard. Therefore our product quality has reliable guarantee and can be exported to North America, South America, Europe, Middle East, Southeast Asia, Australia and many other countries and regions. The annual output is 0.88 million tons.
   Dongpengboda Steel Pipe Group will be "quality first, users first" for the purpose of advanced technology and equipment and strict management, to provide you with quality products and sincere service. Welcome friends to visit our factory!

We are the professional erw steel pipe manufacturer in China,and have 10 years of export experience.If you're interested in our products, please contact us.You will be not regret to contact with us!Welcome to visit our factory any time.


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