ASTM-A672 GR C70 CLASS 22 Mild Black Welded Steel Pipe ,here we refer to LSAW welded pipe.

LSAW welded pipe is made with double submerged arc welding lines,,which is always for big diameters.

General Process Flow
Vacuum Lifting - Ultrasonic Testing - Edge Crimping - Press Bending - Surface Inspection - Edge Milling - Roll Bending - Tack Welding - Tab Welding - Internal Welding - External Welding - Tab Removal - Ultrasonic Testing - X-Ray Testing - Mechanical Expanding - Hydrostatic Testing - End Facing/Beveling) - Ultrasonic Testing - X-Ray & Film Examination - Final Inspection - Weighing and Measuring - Coating - Marking

Diameter: 325-1420mm (14"-60")
Thickness: 8-60mm
Length: 3-13m
Steel Material: Q235A, Q235B, Q345, ASTM A53/106, API 5L GR.A/B, A672 B60 CL22, L245 L290 X42 X46 X70 X80
Standards: API 5L, ASTM A672, SY/T5768-2006, GB/T3091-2008, GB/T9711-1

Applications
Our LSAW steel pipe is used to transfer oil, gas, and slurry to construction site. It is also used in the chemical plant, power plant, and offshore drill platform.

Depending on different product specifications, features, and applications, we will choose diversified means of packing and transport. This ensures the product can be delivered to customer site in wholesome condition.

Packaging
Ordered products will first be coated with a layer of film. Then they are packed in bundles with steel strip.

Transport
The products can be put into a container or loaded individually. They can be transported by train, car, or plane.

The double submerge arc welded pipe is made of steel plate or steel strip that has been bent and its joint is welded together to form a tube with uniform wall thickness and high dimensional accuracy.

Double submerged arc welding is a simple process that enables high productivity and a wide range of specifications while requiring little investment in the equipment used. It can produces two forms of seams, longitudinal and helical. However, this process does have drawbacks. Pipes coming out of the DSAW line can hardly be used in the petrochemical equipment.

Along with the advances in industrial technology and welding and inspection techniques, the LSAW steel pipe now can be available with improved weld quality and more diversified specifications. This also leads to a boost in LSAW pipe applications in petrochemical equipment. When the nominal diameter of the pipe reaches beyond 600mm, it will be more different to produce a seamless pipe. In that case, the use of LSAW steel pipe in transferring fluids will prevail.

Who We Are 

Cangzhou High Booming Pipe Equipment Co.Ltd is a leading manufacturer & exporter of steel pipe & pipe fittings in China. Located in Cangzhou, a well-known “steel city” and near to Tianjin, we can make the delivery and container loading much faster and more convenient

High Booming has started its business from OCTG pipes, seamless pipes and expanded to ERW pipes, SSAW pipes, hollow sections and pipe fittings in order to provide one-stop resources integrating services for the clients and help them finish the projects effectively. Our production base is centered in Hebei and Tianjin. And all the factories are API/ISO/CE/FPC certified with highly equipped production lines and sophisticated technical engineers. Meanwhile, given the friendly& trustworthy relationship, we can also suppy the first-hand resources from the large famous mills like TPCO, Baotou Group, Bao Steel, Anhui Tianda, Linzhou Fengbao etc.

Our main product specification:

1. OCTG PIPE: Casing, Tubing, Coupling, Pup Joint, OD 60.3-508mm

2. SMLS PIPE: OD 21.3-914mm

3. ERW steel pipe, LSAW pile pipe, Spiral steel pipe

4. HOLLOW SECTION: OD: 20*20-600*600mm

The steel pipe and fittings are manufactured according to international standards such as GB, ASTM, API, DIN, JIS, EN etc. Custom-made steel product is also acceptable as per customer’s requirements. Engaged in steel industry for 15+ years, High Booming has successfully supported in many kinds of projects, such as oil & gas, well drilling, pipeline transmission, machinery, construction, marine & offshore etc. And our steel products have enjoyed a very good reputation in many countries and regions.

Welcome to visit us !

We look forward to establishing a long-term cooperative relationship with you!