Seamless Steel Pipes

Seamless Steel Pipe

Seamless steel pipe is a long strip of steel with hollow section and no joint around it，Rolling methods include hot rolling, hot extrusion and cold drawing (rolling) steel pipee, the material is include carbon steel bar and stainless steel bar.Compared with welded pipe, the performance and result strength of seamless steel pipe are much stronger than welded pipe.

JSFittings is a leading manufacturer of hot rolled and cold drawn seamless steel pipes, offering a wide range of carbon steel, alloy steel, and mechanical tubing for high-pressure, high-temperature, and structural applications.

Sizes:

Maximum diameter: 36″ (914.4mm)      minimum diameter: 1/2″ (21.3mm)
Maximum thickness: 60mm                     mininmum thickness: 2.11mm

SCH: SCH10,SCH20,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120,SCH160

Dimensional Tolerance Checks(Per ASTM A530/API 5L)

Parameter	Tolerance	Instrument Used
Outer Diameter(OD)	±1%of nominal OD (or±0.79mm)	Pi tape/Laser micrometer
Wall Thickness(WT)	±12.5%(SCH40 and below)	Ultrasonic thickness gauge(UTG)
Length	±3mm for random,±6mm for cut-length	Calibrated tape measure
Straightness	≤0.2%of total length	Optical comparator
Bevel Angle (for welding)	30°-35°(±5°)	Bevel protractor

Seamless Steel Pipe Production Process

The production process of seamless steel pipe can be divided into cold drawing and hot rolling.
1. The production process of cold-rolled seamless steel pipe is generally more complex than hot rolling. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe. The wall thickness of cold-rolled seamless steel pipe is generally smaller than that of hot-rolled seamless steel pipe, but the surface looks brighter than that of thick-walled seamless steel pipe. The surface is not too rough, and the diameter does not have too many burrs.
2. The delivery status of hot-rolled seamless steel pipe is generally hot-rolled and delivered after heat treatment.

More details messages about the difference of cold drawing and hot rolling seamless steel pipe, please click here.

Seamless Steel Pipe Application:

Our seamless steel pipes are widely used in:

• Oil and gas transportation
• Boiler and heat exchanger
• Mechanical engineering
• Hydraulic tubing
• Construction and structural support
• Automotive tube
• Petrochemical pipeline

Why Choose Our Seamless Steel Pipes?

1. Factory-direct price with fast delivery time
2. Exported to 40+ countries (USA, UAE, Saudi Arabia, Brazil, Korea, etc.)
3. 30,000-ton production capacity guarantee | Stable supply of large-scale project needs
4. Dual-standard certified steel pipes | API 5L + EN 10219 dual compliance assurance
5. Standards: ASTM A53 B, ASTM A106 Gr. B, ASTM A179, ASTM A192, ASTM A333 and API 5L Gr B to X70
6. Coatings: Depending on client requests, 3PE, FBE, and Zinc Coating will be applied.

FAQ

Q1: Do you accept third-party inspection?
Yes, SGS, BV, TUV are all acceptable.

Q2: Can I order customized sizes?
Yes, special OD/WT and lengths are available.

Q3: What’s your MOQ?
1 ton for common sizes.

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JSFITTINGS offers a comprehensive carbon steel pipe portfolio adhering to major international standards.
This includes API 5L steel pipes for oil and gas transmission,
ASTM A106 Grade B steel pipes for high-temperature service,
ASTM A53 Grade B steel pipes for general piping systems,
ASTM A252 Grade 3 pipes for piling applications,
and ASTM A333 Grade 6 steel pipes for low-temperature environments.
Our product range encompasses seamless and welded (ERW, LSAW, SSAW) steel pipes, coated steel pipes, engineered to meet the rigorous demands of various industrial applications, from mining and construction to water, oil, and gas transmission.

Tell us your:

Size (OD, WT),Standard & Grade,,Quantity,,Application,,Destination port

We will send you a quotation within 2 hours.