Welded Steel Pipe,LSAW Steel Pipe,SSAW Steel Pipe,ERW Steel Pipe,Union Steel Industry Co.,Ltd
Over 30 years of experience
About us
Founded in 1989

Union Steel Industry Co., Ltd as member of United Steel Industry Group, specialized in steel pipe and pipe fittings designing, manufacturing, stocking and exporting in China. As one of the leading manufacturer of steel pipe products in China, Union Steel Industry Co., Ltd are committed to providing one-stop service to customers around the world.


Union Steel Industry Co., Ltd has leading technology of steel pipe production and research at home and abroad, advanced and complete testing facilities. Adhering to our principle of“quality first, win-win cooperation”, we are confident to supply customers with high quality products at very competitive prices.

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Welded Steel Pipe,Carbon Steel Pipe,Seamless Steel Pipe,Stainless Steel Pipe,Coated Steel Pipe,Oilfield Tubular Goods,Pipe Fittings
  • Welded Steel Pipe,Carbon Steel Pipe,Seamless Steel Pipe,Stainless Steel Pipe,Coated Steel Pipe,Oilfield Tubular Goods,Pipe Fittings

    5000+

    Employees
  • Welded Steel Pipe,Carbon Steel Pipe,Seamless Steel Pipe,Stainless Steel Pipe,Coated Steel Pipe,Oilfield Tubular Goods,Pipe Fittings

    3500+

    Equipment
  • Welded Steel Pipe,Carbon Steel Pipe,Seamless Steel Pipe,Stainless Steel Pipe,Coated Steel Pipe,Oilfield Tubular Goods,Pipe Fittings

    20+

    Production Lines
  • Welded Steel Pipe,Carbon Steel Pipe,Seamless Steel Pipe,Stainless Steel Pipe,Coated Steel Pipe,Oilfield Tubular Goods,Pipe Fittings

    450+

    Safety Tools

PRODUCT CATEGORY

Product Category

Carbon Steel Pipe

Carbon steel pipe is made from an alloy of iron and carbon. It’s a strong, durable material resistant to corrosion and oxidation. Because of its strength and ability to withstand stress, carbon steel pipe is used in a variety of heavy-duty industries like infrastructure, ships, distillers, chemical fertilizer equipment, and liquids, gases, solids transportation. Union Steel can offer SAWL/LSAW Steel Pipe, SSAH/SSAWSteel Pipe, EFW/ERW Steel Pipe, SMLS Steel Pipe and Hollow Section in standard size or as customer’s requirement.

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carbon steel pipe,erw steel pipe,lasw steel pipe,ssaw steel pipe,smls steel pipe,hollow section

Product Category

Seamless steel pipe

Product:Seamless steel tube, Line pipe, Boiler tube,Large Diameter Steel Pipe,Precision Pipe Machining Tubes

Production Range:
Hot Rolled Seamless Pipe:OD:Φ32-Φ356mm Thickness:3-50mmWT;Max Length:50m
Hot Expanded Seamless Pipe:OD:Φ32-Φ356mm Thickness:8-50mm;
Cold Rolled Seamless Pipe:OD:Φ20-Φ273mm Thickness:1-32mm
Cold Drawn Seamless Pipe:OD:Φ20-Φ273mm Thickness:1-26mm;Max Length:50m

Steel Material:ASTM A178/179/192/210, A106, EN10216-1/2, DIN17175/1629, JIS G3454,
Steel Grade:A179,A192,GR.A/B/C, P235TR1/2, P235GH, ST45.8, ST37,STB340, STB440,15MoG, 15CrMoG, 16Mn,13CrMo4-5, etc.
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Seamless Steel Pipe, CS SMLS Pipe, Seamless Carbon Steel Pipe, Seamless Pipe,Seamless Carbon Steel Pipe,Carbon Steel Seamless Pipe

Product Category

Oilfield Tubular Goods

Oilfield tubular goods of Union Steel is a collection of seamless rolled products consisting of Tubing and Casing, Slotted Pipe, Drill Pipe and Drill Collar, Pup Joint and Coupling, which are useful in the oil and gas production activities. These OTCG products are manufactured according to the specifications set by API. OCTG can be either seamless or welded and are available in different sizes and lengths.

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oilfield tubular goods

Product Category

Alloy Steel Pipe

Nickel-Copper Alloy Pipe：Outer Diameter: 8-2500mm， (3/8"-100")，Wall Thickness: 0.3-150mm，(SCH10-XXS)

Alloy Steel Pipe：Outside Diameter:1/8'' ~ 26''；Wall Thickness: SCH 30, 30, 40, 60, 80, 120, 140, 160, XS, XXS, STD

Aluminum steel pipe：Outside Diameter: 1/2’’mm - 750mm；Thickness: ≥0.3mm

Titanium alloy pipe：Outer Diameter：6-2500mm， (3/8"-100")；Thickness：0.3-150mm，(SCH10-XXS)

Ends :Plain End, Beveled End, Thread End

Standard & Grade: ASTM A333, A335 P5/P9/P11/P22/P91, ASTM C70600, ASTM B280, ASTM B360, ASTM B111,EN1057, EN12375, BS EN22451, DIN 17175, JIS G3458, JIS H3300,  ASME SB163,  AS1432

Usage:In Petroleum, Aerospace, Chemical, Power, Boilers, Military Industry

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Alloy Steel Pipes

Product Category

Coated Steel Pipe

Coated steel pipe means the pipe that is by the processing after the corrosion, which can effectively prevent or slow the steel pipe occurs in the course of transport and chemical or electrochemical reaction corrosion phenomena. Coated steel pipe can effectively prevent or slow down the corrosion of steel pipes to extend service life and reduce operating costs pipe. Union Steel is a supplier that can offer Galvanized Steel Pipe, FBE Coated Pipe, Epoxy Coated Pipe, 3LPE/3PE Coated Pipe and Concrete Coated Pipe.


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coated steel pipe,galvanized steel pipe,fbe coated pipe,epoxy coated pipe,3lpe coated pipe,concrete coated pipe

Product Category

Stainless Steel Pipe

Stainless steel pipe is used for transporting liquids and gasses in a wide range of industries including mining, oil, natural gas, automotive, and aviation. Union Steel can provide Stainless Seamless Steel Pipe, Stainless Welded Steel Pipe, Stainless Steel Screen Pipe and Stainless Hollow Section in standard sizes, or you can have it custom cut to your specifications.



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stainless steel pipe,stainless seamless steel pipe,stainless welded steel pipe,stainless steel screen pipe,stainless hollow section

Product Category

Pipe Fittings

Pipe Fittings are defined as the piping components that help in pipe routing for directional changes, size changes, and branch connections. Union Steel is one of the top supplier of Flange, Elbow / Reducer / Tee / Cap / Bend and Valves, which are widely used in both the piping and plumbing industries.


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pipe fittings,plumbing fittings,flange,elbow,reducer,tee,cap,bend,valves

Product Category

Structural steel

H Section:Size:100*50-700*300mm;Web Thickness:5-16mm;Web Width:50--300mm;Flange Thickness:4.5-23mm;Flange Width:50-400mm;Length:1-12m or as customer request 

Channel Steel:Dimensions :50*37*4.5-400*104*14.5;75*40*3.8*7-152*76*6.4*9 ;140*60*7*10-200*75*8.5*11.5;Length:6m, 9m, 12m etc

Steel I Beam:Length: 1-12m, meet your requirements;Height : 100mm-320mm;Width : 37mm-132mm or as customer's request;Thickness：4.5mm-11.5mm

Steel Sheet Pile:Type: Z Type, U Type, Cold Formed, Hot Rolled;Standard: JIS A 5523 : 2012,JIS A 5528 : 2012,BS EN 10248-1 : 1996,BS EN 10248-2 : 1996,ASTM A572M/A572-12,ASTM A6/A6M-12

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Steel Sheet Pile,Interlocking Sheet Pile，H Beam, I Beam, U Beam

Product Category

Value Added Products

Value added product has been enhanced with additional qualities that make it worth a higher price than the raw materials used to make it. It may be made more convenient, more attractive, more palatable, or easier to use than its raw ingredients. Union Steel can offer you Finned Tube, Pin Tube, Screen Pipe, Piling Pipe and Steel Sheet Pile.
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value added products,finned tube,pin tube,screen pipe,piling pipe,steel sheet pile

Product Category

Steel Plate

Carbon steel Plate:Thickness:0.1mm-5000mm，etc  Width : 0.5mm-2.5m，etc Length: 1m-12m,or customized

Stainless Steel Plate:Thickness:0.01~200mm  ;Width:1000mm to 3500mm,etc   Length:2000mm to 6000mm,etc  

Aluminum Steel Plate:Thickness: 0.20mm - 500mm Width: 1000mm to 3800mm etc Length:1000mm - 12000mm

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Carbon steel Plate,Mild Steel Sheet,Cold rolled steel plate ,Hot Rolled Carbon Steel Plate,High Carbon Steel Sheet

Our workshop

PROJECTS

Union Steel is committed to providing one-stop service for steel pipe products to customers around the world. Many years of large scale project experience in various fields.

LATEST NEWS

The influence of metal elements in the production of SSAW steel pipe

2025-01-22

metal elements influence on spiral steel pipe,metal elements influence on ssaw steel pipe
More Details

  • 01-21

    2025

    Do carbon steel pipes need to be painted when used in high-temperature systems?
    Carbon steel pipes (CS pipes) are commonly used in industries such as petroleum, chemicals, and natural gas. These pipes are essential for transporting oil, gas, water, and other media. In high-temperature systems, carbon steel pipes are primarily used to carry high-temperature media such as steam and hot water. This article will briefly introduce whether carbon steel pipes need to be painted when used in high-temperature systems.

  • 01-21

    2025

    Why do carbon steel pipes need to be sprayed with black paint?
    Carbon steel is an iron-carbon alloy that is prone to oxidation and rusting, as its surface is easily affected by environmental factors. Typically, it contains small amounts of silicon, manganese, sulfur, and phosphorus. Generally, the higher the carbon content, the harder and stronger the steel becomes, but its plasticity decreases. To protect the surface from oxidation, a layer of black paint is applied before the steel leaves the factory. During long-term use, carbon steel pipes (CS pipes) are vulnerable to corrosion caused by chemical media, water vapor, oxygen, and microorganisms, especially in corrosive environments such as seawater. To extend their service life, carbon steel pipes must undergo anti-corrosion treatment.

  • 01-20

    2025

    The main technical characteristics of SSAW steel pipe
    Spiral Submerged Arc Welded (SSAW) steel pipes are known for their distinctive production process and technical advantages. Below are the key characteristics that define SSAW steel pipe production.
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Welded Steel Pipe,Carbon Steel Pipe,Seamless Steel Pipe,Stainless Steel Pipe,Coated Steel Pipe,Oilfield Tubular Goods,Pipe Fittings

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