Longitudinally Welded Steel Tubes

Longitudinally Welded Steel Tubes are formed from steel coils or strips by heating and welding. Their weld seams extend along the length of the pipe and are usually welded using arc welding or high frequency welding techniques. Such steel pipes are widely used in construction, machinery manufacturing, and oil transportation.

 

Advantages

Lower cost
The raw materials used in the production process of Longitudinally Welded Steel Tubes are generally steel coils or steel strips. These materials have high utilization rates, which reduces the generation of waste and reduces costs; the welding process of straight seam steel pipes is simple, and the welding process can be completed in continuous production, without complex equipment or multiple processing, shortening the production cycle; compared with other types of steel pipes (such as spiral welded pipes), the production equipment investment of straight seam steel pipes is low and the production cost is low.

 

Good strength
The welding methods used in Longitudinally Welded Steel Tubes (such as arc welding, high-frequency welding, etc.) make the welds tightly combined with the parent material, with high welding strength, and can effectively withstand internal and external pressures and loads; the welds are evenly distributed along the length of the pipe, which enhances the overall strength and is suitable for bearing high pressure. Commonly used steel grades include Q215, Q235, etc., with good mechanical properties and tensile strength; our production follows international standards such as ASTM and GB, so that each pipe can meet the specified strength requirements.

 

Good weldability
Longitudinally Welded Steel Tubes advanced welding processes (such as high frequency welding, DC arc welding, etc.) are used, which can provide stable heat input during welding to ensure the quality and consistency of the weld; the welded joints usually adopt appropriate groove shapes and welding sequences to reduce stress concentration and deformation, and ensure the strength and toughness of the welded joints; before welding, the surface treatment of the steel pipe (such as removing oxides and oil stains) can improve the metal contact quality during welding and enhance the welding effect; after welding, heat treatment or stress relief treatment is carried out to further improve the microstructure of the welded joint and enhance the crack resistance and fatigue resistance.

 

Recyclability
Steel itself is recyclable. Through recycling, steel can be remelted and made into new products, which is conducive to reducing resource waste; with the increase in demand in the metal market, recycling straight seam steel pipes has certain economic value, and scrap steel pipes can be sold to recycling companies or smelters to create additional economic benefits; by recycling straight seam steel pipes, waste entering landfills can be reduced, the environmental burden can be reduced, and sustainable development can be promoted.

 

Diversified specifications
A variety of wall thicknesses (0.50-6.0mm) and lengths are available to meet the different needs of customers.

 

Strong adaptability
Longitudinally Welded Steel Tubes are widely used in many industries such as construction, machinery, transportation, water conservancy projects, oil and gas industries, etc., to meet the needs of different fields, especially suitable for occasions requiring high strength and good corrosion resistance.

 

1. 4 QC staff with more than 5 years of experience randomly check products during and after production.

2. Nationally recognized laboratory with CNAS certificate.

3. Third-party inspections specified/paid by the buyer, such as SGS, BV, are acceptable.

4. Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and the United Kingdom.

5. 100% after-sales quality and quantity guarantee.

6. Professional sales manager quickly responds within 24 hours.

7. Regular size sufficient stock.

8. Free sample 20cm high quality.

9. Strong production capacity and capital flow.

 

If you need customized products, there will be exclusive customer service for you. We will offer you one-stop service. Please contact our product consultant on the right side to get more discounts.

 

Product Name	Hot Dip Galvanized Steel Pipe/Tube
Surface	Galvanized (40-60g/m2 usual, can be request by customer)
Shape	Round/Square/Rectangular
Standard	ASTM, BS, GB, DIN, JIS, EN, etc.
Payment terms	TT deposit + BL copy / LC or 100% LC at sight
Steel Grades	Q215A; Q215B; Q235A; Q235B, etc.
MOQ	5 tons for normal size and material
Trade terms	FOB, C&F, CIF, EXW
Length	Fixed or random, as customer request.
Wall Thickness	0.50-6.0 mm
Zinc Coating	60 g/m2-700 g/m2
Proportionality Coefficient (c)	1.064, 1.051, 1.045, 1.040, 1.036, 1.034, 1.032, 1.028

 

 

 

Q: Can you send samples?

A: Of course, we can send samples to all parts of the world, our samples are free, but customers need to bear the courier costs.

 

Q: What product information do I need to provide?

A: You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.

 

Q: About product prices?

A: Prices vary from period to period due to cyclical changes in the price of raw materials.

 

Q: What are the certifications for your products?

A: We have ISO 9001, SGS, EWC and other certifications.

 

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