China Factory Suppliers of Rectangular & Square Section Tubes | High-Quality Seamless Pipes

Our factory, located in the North China Economic Development Zone, benefits from high-speed and convenient transportation, making it an ideal hub for seamless steel pipe production. Established in 2002 with a total investment of 120 million yuan, we are proud to employ 15 senior engineers and over 500 dedicated staff members. We specialize in producing a wide range of seamless pipes with various specifications, including outer diameters from 40-108 mm with wall thicknesses of 12-30 mm, 108-219 mm with wall thicknesses of 20-40 mm, and 210-426 mm with wall thicknesses of 20-50 mm. Currently, our raw material stock exceeds 15,000 tons of seamless steel pipe and 8,000 tons of ERW pipes, As a leading supplier in China, we offer an extensive selection of materials to meet diverse industry needs. Our product range includes high-quality options such as 12CrIMoVG, 15CrMoG, 10CrMo910, Cr5Mo, A335P91, T91, A335P5, A335P11, 12Cr2MoWVTiB(102), CrMo, 15McuMoNb5(NB36), 40CrMnMo, 36Mn2V, Cr9Mo, 38CrMoA1, 3035CrMnSiA, 1Cr5Mo, 20CrNiMo, 25Cr2MoV, 35Mn2VNb, 37Mn5, 25MnCr, 40MnV, T11, T12, T22, T24, 30CrMo, 35CrMo, 15NiCuMoNiB5(WB36), 42CrMo, and 38CrM. Our commitment to quality and customer satisfaction positions us as a trusted supplier for all seamless pipe needs in the market

Product Description

Professional Seamless Steel Pipe Production

Our workshops are equipped with advanced manufacturing facilities supported by high-speed, convenient transportation networks. Established in 2002 with a total investment of 120 million yuan, our technical team includes 15 senior engineers and more than 500 skilled employees. We specialize in producing seamless pipes with various specifications, including outer diameters ranging from 40mm to 426mm and wall thicknesses from 12mm to 50mm. Our current inventory maintains over 15,000 tons of seamless steel pipe and 8,000 tons of ERW pipes to ensure rapid response to market demands.

Materials & Manufacturing Standards

Oil & Pipeline Steel

J55, K55, N80, L80, P110, X40-X70, L245, L360

Stainless Steel

304, 304L, 310S, 316, 316L, 0Cr18Ni9, 1Cr18Ni9Ti

Alloy & Carbon Steel

10#, 20#, 45#, Q345B, Q345D, 16Mn, 27SiMn, 40Cr

Boiler Materials

20G, ST45.8-III, A106B, A106C, 12Cr1MoVG, 15CrMoG

Extended Material Reference:

12CrIMoVG, 15CrMoG, 10CrMo910, Cr5Mo, A335P91, T91, A335P5, A335P11, 12Cr2MoWVTiB(102), CrMo, 15McuMoNb5(NB36), 40CrMnMo, 36Mn2V, Cr9Mo, 38CrMoA1, 3035CrMnSiA, 1Cr5Mo, 20CrNiMo, 25Cr2MoV, 35Mn2VNb, 37Mn5, 25MnCr, 40MnV, T11, T12, T22, T24, 30CrMo, 35CrMo, 15NiCuMoNiB5(WB36), 42CrMo.

Customized Solutions

We provide customized special specifications and thick-wall seamless pipes to meet unique engineering requirements. Our options include cold-drawn pipes, hot-expansion diameter seamless steel pipes, and high-pressure boiler tubes following international standards such as JIS, DIN, and ASTM.

Available Standards: GB/T8162, GB3087, GB5310, GB6479, GB9948, ASTM A335, DIN 13CrMo44, and more.

Frequently Asked Questions

What are the size ranges for your seamless steel pipes?
We offer a wide range of sizes: outer diameters from 40mm to 426mm and wall thicknesses ranging from 12mm up to 50mm, covering various industrial applications.
Which steel grades do you typically provide?
Our materials include Carbon Steel (10#, 20#, 45#), Stainless Steel (304, 316L, 310S), Alloy Steel (Q345B, 16Mn, 40Cr), and specialized Oil Casing grades like J55, N80, and P110.
Do you offer customized pipe specifications?
Yes, we support customized special specifications, including thick-wall seamless pipes and special alloy materials like 15CrMoG and 12CrlMoVG.
What is your current stock capacity for quick delivery?
We maintain a consistent inventory of over 15,000 tons of seamless steel pipes and 8,000 tons of ERW pipes as raw material stock to ensure stable supply.
What manufacturing standards do you comply with?
Our products meet various international and domestic standards including GB/T series (8162, 8163), GB5310, as well as JIS, European (DIN), and American (ASTM) specifications.
What specialized boiler materials are available?
We supply high-pressure boiler materials such as 20G, ST45.8-III, A106B, A106C, and a variety of Cr-Mo alloy tubes for high-temperature environments.

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