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Brief introduction to SSAW steel pipes

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SSAW steel pipe,spiral submerged arc welded steel pipe,spiral welded pipe,spiral steel pipe

Brief introduction to SSAW steel pipes

Date:2024-09-30

SSAW steel pipes, also known as spiral submerged arc welded pipes, are manufactured by spirally bending hot-rolled strip steel. The spiral seam steel pipe (commonly referred to as spiral welded pipe or spiral steel pipe) is produced through automatic submerged arc welding on both the inner and outer surfaces of the pipe, resulting in a weld seam shaped like a helix.

 

SSAW pipes utilize the same submerged arc welding technology as LSAW (longitudinal submerged arc welded) pipes. The key difference between the two lies in the welding pattern: SSAW pipes have a spiral weld, whereas LSAW pipes are welded longitudinally along the pipe's length. During the SSAW manufacturing process, the steel strip is rolled at an angle to the pipe's centerline, which forms the spiral seam during welding.

 

This article provides a brief introduction to SSAW steel pipes, their formation process, and their distinctive welding technology.

 

Chemical Analysis and Mechanical Properties of SSAW Steel Pipe

The raw material of the SSAW steel pipe includes steel coil, welding wire, flux. All of raw materials must be through strict physical and chemical maintenance before the investment.

Standard

Grade

Chemical Composition(max)%

Mechanical Properties(min)

C

Si

Mn

P

S

Tensile Strength(Mpa)

Yield Strength(Mpa)

API 5CT

h40

0.03

417

417

J55

0.03

517

517

K55

0.3

655

655

API 5L PSL1

A

0.22

0.9

0.03

0.03

335

335

B

0.26

1.2

0.03

0.03

415

415

X42

0.26

1.3

0.03

0.03

415

415

X46

0.26

1.4

0.03

0.03

435

435

X52

0.26

1.4

0.03

0.03

460

460

X56

0.26

1.4

0.03

0.03

490

490

X60

0.26

1.4

0.03

0.03

520

520

X65

0.26

1.45

0.03

0.03

535

535

X70

0.26

1.65

0.03

0.03

570

570

API 5L PSL2

B

0.22

0.45

1.2

0.025

0.015

415

415

X42

0.22

0.45

1.3

0.025

0.015

415

415

X46

0.22

0.45

1.4

0.025

0.015

435

435

X52

0.22

0.45

1.4

0.025

0.015

460

460

X56

0.22

0.45

1.4

0.025

0.015

490

490

X60

0.12

0.45

1.6

0.025

0.015

520

520

X65

0.12

0.45

1.6

0.025

0.015

535

535

X70

0.12

0.45

1.7

0.025

0.015

570

570

X80

0.12

0.45

1.85

0.025

0.015

625

625

ASTM A53

A

0.25

0.1

0.95

0.05

0.045

330

330

B

0.3

0.1

1.2

0.05

0.045

415

415

ASTM A252

1

0.05

345

345

2

0.05

414

414

3

0.05

455

455

EN10217-1

P195TR1

0.13

0.35

0.7

0.025

0.02

320

320

P195TR2

0.13

0.35

0.7

0.025

0.02

320

320

P235TR1

0.16

0.35

1.2

0.025

0.02

360

360

P235TR2

0.16

0.35

1.2

0.025

0.02

360

360

P265TR1

0.2

0.4

1.4

0.025

0.02

410

410

P265TR2

0.2

0.4

1.4

0.025

0.02

410

410

EN10217-2

P195GH

0.13

0.35

0.7

0.025

0.02

320

320

P235GH

0.16

0.35

1.2

0.025

0.02

360

360

P265GH

0.2

0.4

1.4

0.025

0.02

410

410

EN10217-5

P235GH

0.16

0.35

1.2

0.025

0.02

360

360

P265GH

0.2

0.4

1.4

0.025

0.02

410

410

EN10219-1

S235JRH

0.17

1.4

0.04

0.04

360

360

S275JOH

0.2

1.5

0.035

0.035

410

410

S275J2H

0.2

1.5

0.03

0.03

410

410

S355JOH

0.22

0.55

1.6

0.035

0.035

470

470

S355J2H

0.22

0.55

1.6

0.03

0.03

470

470

S355K2H

0.22

0.55

1.6

0.03

0.03

470

470

 

Applications of SSAW Steel Pipes

SSAW steel pipes are widely used in various industries due to their versatility and strength. Common applications include:

- Fluid Service: Suitable for transporting fluids in a variety of conditions.

- Low Pressure Fluid Service: Ideal for pipelines that carry low-pressure fluids.

- Pipelines for Low Pressure Fluid Service: Specifically designed for low-pressure fluid transport in pipelines.

- Pressure Applications: Used in systems that require pipes to withstand pressure, ensuring safety and durability.

- Pipe Piles: Commonly used in construction as pipe piles, providing structural support for foundations.

- Cold-Formed Welded Structural Hollow Sections: Made from non-alloy and fine-grain steels, these pipes are used in structural applications where strength and stability are needed.

- Pipeline Transportation for Petroleum and Natural Gas (Class A Steel Pipe): Essential for transporting petroleum and natural gas in large-scale pipeline systems.

- Casing or Tubing for Wells: Used in the petroleum and natural gas industries for well casing and tubing, offering protection and structural integrity for drilling operations.

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