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Home > SSAW Steel Pipes > ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
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ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P
ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P

ASTM A511 A778 Gr B Gr a Spiral Welded Steel Pipe Fluid Pipe SSAW Welded Steel Pipe Low Pressure Fluid ERW Welded Spiral Steel Tube Used for Water Well Casing P

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Product Description

Basic Specifications
Model NO.
Spiral Welded Steel Pipe
Type
Welded
Technique
SAW
Material
Carbon Steel
Section Shape
Round
Outer Diameter
22 - 630 mm
Thickness
6-30mm
Steel Grade
Q235/Q355 S235/S355 Ss400
Surface Treatment
Black
Origin
China
Product Overview

ASTM A511 A778 Spiral Welded Steel Pipe is manufactured by rolling low-carbon structural steel or low-alloy structural steel strip according to a specific spiral angle (forming angle) into a tube blank. The tube seam is then welded together using advanced submerged arc welding (SAW) techniques.

This process allows the production of large diameter steel pipes from relatively narrow steel strips. These pipes are widely used for water well casing, low-pressure fluid transport, and structural applications.

Type Standard Outer Diameter Wall Thickness
ERW / HFW API 5L, ASTM A53 Gr.B 1/8 - 20 inch 0.4 - 16 mm
LSAW / DSAW ASTM A106, JIS G3463 12 - 56 inch 6.0 - 40 mm
SSAW / HSAW ASTM A511, A778 8 - 126 inch 6.0 - 26 mm
Product Display
Spiral Welded Steel Pipe
Spiral Pipe 1
Spiral Pipe 2
Spiral Pipe 3
Spiral Pipe 4
Spiral Pipe 5
Spiral Pipe 6
Key Advantages
1
Different diameters can be produced from the same width of strip steel; large diameters can be produced from narrow strips.
2
Lower stress on spiral seams (75% to 90% of straight seams), allowing higher pressure endurance.
3
High accuracy: diameter tolerance ≤ 0.12%, deflection < 1/2000, and ovality < 1%.
4
Continuous production capability with minimal material loss, increasing metal utilization by 6% to 8%.
5
Portable production units can be used directly at construction sites for efficient pipeline laying.
Manufacturing Process & Testing

Our production utilizes raw strip steel coils, high-grade welding wire, and flux. Every stage involves strict monitoring:

  • Double-wire submerged arc welding for internal and external seams.
  • Continuous ultrasonic automatic flaw detection for 100% weld coverage.
  • Leveling, trimming, and pre-bending of strip steel before forming.
  • Air plasma cutting into single pieces for precision.
Manufacturing Process Welding Process
Applications

Spiral welded pipes are essential in various industries including pipeline transport, oil and gas drilling, chemical industry, mining, and large-scale construction projects like water well casing.

Application Gallery
Frequently Asked Questions (FAQ)
What is a Spiral Welded Steel Pipe (SSAW)?
It is a steel pipe formed by rolling structural steel strips at a specific spiral angle and welding the seam using submerged arc welding. It allows for the creation of large-diameter pipes from narrow strips.
How does SSAW compare to straight seam welded pipe?
Spiral seams experience 10% to 25% less stress than straight seams under the same pressure, allowing for thinner walls or higher pressure ratings for the same diameter.
What quality inspections are performed?
We perform 100% nondestructive testing using online continuous ultrasonic automatic flaw detectors. We also conduct physical and chemical inspections on raw materials and visual dimensional checks.
What surface treatments can be applied?
Common treatments include being bared, oiled, color painted, 3LPE coating, or other anti-corrosive treatments to suit different environmental requirements.
What are the typical length and diameter specifications?
The standard length is usually between 5.8m and 12m, but can be customized. Outer diameters range from 219.1mm to 3,200mm for SSAW pipes.
Are these pipes suitable for high-pressure fluid transport?
Yes, due to their manufacturing process and high-grade materials (like Q355 or S355), they are widely used for gas, oil, and water transport under various pressure conditions.

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