High Quality St37 St52 St45 Black Carbon Steel Tube ERW Welded Steel Pipe

📋 Basic Information

Model NO.:Welded Steel Tube

Type:Welded

Technique:Cold Drawn

Material:Carbon Steel

Surface:Galvanized

Section Shape:Round

Grade:St37 St52 St45

Wall Thickness:2.11-50mm

Outer Diameter:20mm-508mm

Origin:China

Production:1000 Tons

Zinc Coating:Z100 Z275

🛠️ Product Description

Welded pipe, also known as welded steel pipe, is a welded pipe product.
The production process usually includes forming, welding, and finishing. Specifically, hot-rolled or cold-rolled strip is used as raw material, bent into a tube with a straight or spiral seam, and then welded using different heat sources to achieve required strength. Final steps include calibrating, cutting, straightening, heat treatment, and testing.

📸 Detailed Photos & Features

High production efficiency: Simple process enables rapid large-quantity production.
Wide range of specifications: Customizable length, diameter, and thickness.
Lower equipment investment: More cost-effective than seamless pipe production.
Extensive application: Used in water supply, petrochemical, power, agriculture, and urban construction.

📊 Product Parameters

Tube for Machining Structure
Variety Classification	Measure		Steel Grade/Brand	Executive Standard	Application Area
Variety Classification	OD (mm)	WT (mm)	Steel Grade/Brand	Executive Standard	Application Area
Structural Pipe	42~760	4~120	20#, 35#, 45#, Q345A/B/C/D, 27SiMn	GB/T 8162	General structure, Mechanical tube
Vehicle Tube	45~245	4~35	20Mn2, SAE1527, 40Cr, 45Mn2	YB/T5035	Automobile axle and sleeve
Geological Drilling	42~133	4~25	DZ40, DZ55, STM-R780, DZ60	GB/T 9808	Drilling pipe
Hydraulic Prop	42~760	4~120	27SiMn, 30CrMnSiA	GB/T 17396	Hydraulic equipment, Truck cranes
Fluid Conveying	42~760	4~120	20#, Q345, Q390	GB/T 8163	Fluid conveying

🏆 Certifications & Our Advantages

🔬 Test and Qualification

🏢 Profile

Professional steel solutions provider founded in 2015, specializing in Carbon steel plates, Stainless steel, and structural profiles including channels, angles, H beams, and various steel tubes. Cutting, bending, galvanizing, and painting services are available. All products are qualified with chemical and strength results approved by SGS or BV tests. We supply materials for power plants, oil and gas transport, and construction projects globally, reaching over 40 countries. Our stock quantity reaches 10 thousand tons, ensuring delivery within seven days.

❓ FAQ

1. Who are we?

We are a GB/T 19001-2016/ISO 9001:2015 certified professional total solution provider and supplier of steel products.

2. What products can we supply?

We provide one-stop steel sales including steel coils, plates, profiles, pipes, and steel structures.

3. What do we specialize in?

We specialize in medium and heavy plates, shipbuilding boards, high-strength steel, weathering resistant steel, and boiler vessel steel plates.

4. What is our payment term?

Our standard term is 30% T/T advance and 70% T/T balance before delivery.

5. Can I have a free sample?

Yes, small size samples are provided free of charge, though clients bear the delivery fee.

6. What is the lead time?

We arrange production immediately upon receipt of advance payment and ship once the balance is settled.

High Quality St37 St52 St45 Black Carbon Steel Tube ERW Welded Steel Pipe

Product Description

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