Spiral Steel Pipe
Spiral submerged arc welded (SSAW) steel pipe is formed by helically welding a continuous strip into a pipe, which allows large diameters and long lengths to be produced efficiently. This matters when the project requires high-capacity foundation piles, offshore structures or long-distance conveyance lines where mill length and diameter are constrained. Jialu supplies SSAW pipe across API 5L, API 5CT and ASTM A53 fam
- Helical weld construction enables large diameter and long length production beyond typical mill limits
- Single-source supply of API 5L, API 5CT and ASTM A53 grades on one order, reducing mill splits
- 3LPE, PE, black paint and varnish external coatings available for corrosion resistance in harsh environments
- Internal epoxy resin or mortar cement lining for water, oil and chemical conveyance in aggressive service
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
What This Material Is For
Spiral submerged arc welded (SSAW) steel pipe is formed by helically welding a continuous strip into a pipe, which allows large diameters and long lengths to be produced efficiently. This matters when the project requires high-capacity foundation piles, offshore structures or long-distance conveyance lines where mill length and diameter are constrained. Jialu supplies SSAW pipe across API 5L, API 5CT and ASTM A53 families, so a project needing API 5L X60 trunk line, API 5CT K55 casing and ASTM A53 B structural pipe does not have to be split across multiple mills. The pipe is available with 3LPE, PE, black paint or varnish external coating and epoxy or mortar lining internally, which supports both corrosive and high-pressure service.
Why Buyers Choose It
- Helical weld construction enables large diameter and long length production beyond typical mill limits
- Single-source supply of API 5L, API 5CT and ASTM A53 grades on one order, reducing mill splits
- 3LPE, PE, black paint and varnish external coatings available for corrosion resistance in harsh environments
- Internal epoxy resin or mortar cement lining for water, oil and chemical conveyance in aggressive service
- Longer mill lengths reduce the number of field welds and joint inspections in large-scale projects
Where It Is Used
- Offshore platform foundation piles requiring high load-bearing capacity and corrosion resistance
- Bridge and wharf pier piles in marine environments with saltwater exposure
- Onshore oil and gas transmission lines in API 5L PSL2 X60 and X70 grades
- Casing and tubing strings in oil wells using API 5CT J55 and K55 grades
- Water and wastewater conveyance systems using internally lined ASTM A53 B pipe
- High-rise building foundations using large-diameter SSAW piles for deep load transfer
Who It Is For
- Civil engineering contractors building offshore platforms, bridges and wharves
- Oilfield service companies sourcing casing and tubing for drilling operations
- Water and wastewater utilities needing long-length, internally lined pipe
- Infrastructure developers requiring large-diameter foundation piles for high-rise structures
- Pipeline contractors managing long-distance transmission lines with minimal field joints
Problems It Solves
- Splitting one pipe scope across multiple mills due to diameter or length limitations
- Delays caused by multiple inspection dates and shipment schedules from different suppliers
- Lack of availability for large-diameter, long-length pipe in standard mill sizes
- Corrosion failure in service due to missing internal or external coating
- Field welding required at every joint when mill length is too short for project span
Technical Features
- Helical submerged arc welding process with automated seam inspection
- External coatings: 3LPE, PE, black paint, varnish; internal linings: epoxy resin, mortar cement
- Available in API 5L PSL1 and PSL2, API 5CT, ASTM A53 and ASTM A252 grades
- Diameter range from TBC to large sizes suitable for foundation and offshore use
- Mill length up to 12 meters or longer, depending on grade and diameter
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| API 5L PSL1 grades | A, B, X42, X46, X52, X56, X60, X65, X70 |
|---|---|
| API 5L PSL2 grades | B, X42, X46, X52, X56, X60, X65, X70, X80 |
| API 5CT grades | H40, J55, K55 |
| ASTM A53 grades | A, B |
| ASTM A252 grades | 1, 2, 3 |
| External coating | 3LPE, PE, black paint, varnish |
| Internal lining | Epoxy resin, mortar cement |
| Weld inspection | Automated ultrasonic testing of helical seam |
| Standards | API 5L, API 5CT, ASTM A53, ASTM A252 |
Materials
- Carbon steel for general structural and conveyance duty in API 5L and ASTM A53 families
- Low-alloy steel for higher strength and toughness in API 5L PSL2 and API 5CT grades
- Corrosion-resistant coatings and linings for service in water, oil, and marine environments
- Mortar cement lining for potable water and wastewater applications
- Epoxy resin lining for chemical and oil transport where internal surface integrity is critical
Manufacturing Route
Quality Control
- Chemical composition and mechanical property checks against the ordered specification
- Automated ultrasonic testing of the helical weld seam
- Coating thickness and adhesion testing for external and internal layers
- In-house laboratory holding CNAS certification performs routine testing
- Mill certificates issued against the grade and standard stated on the purchase order
Customisation Options
- Grade and standard selected per line item, so one order can mix API, ASTM and other callouts
- External coating and internal lining specified at order stage
- Cut lengths and end preparation arranged to suit project requirements
- OEM service accepted
- Packing and marking arranged to suit destination port and inspection regime
How It Compares With The Alternatives
| Seamless steel pipe | Spiral is more cost-effective for large diameters and long lengths; seamless is preferred for high-pressure, sour-service lines where weld seam is a concern |
|---|---|
| ERW welded pipe | Spiral wins on diameter and length; ERW is better for smaller diameters and lower-pressure applications |
| Straight seam welded pipe | Spiral allows longer mill lengths and larger diameters; straight seam is limited by strip width and mill capacity |
Buying Guide
- Start from the project’s design code and service environment to select the grade and coating
- For offshore or marine use, specify 3LPE or epoxy lining to prevent corrosion
- For water or wastewater, confirm whether mortar cement or epoxy lining is required
- Send the required diameter, wall thickness, length and coating details in the enquiry
- Book third-party inspection at order stage to align production schedule with delivery timeline
Questions About Spiral Steel Pipe
Which grades of SSAW pipe do you supply?
API 5L PSL1 A/B and PSL2 B/X42 to X80, API 5CT H40/J55/K55, ASTM A53 A/B, and ASTM A252 1/2/3.
Can one order include multiple grades and coatings?
Yes. Mixed-grade and mixed-coating scope on one purchase order is standard practice.
What external coatings are available?
3LPE, PE, black paint, and varnish.
What internal linings are available?
Epoxy resin and mortar cement.
What is the maximum mill length?
Up to 12 meters or longer, depending on diameter and grade.
Can third-party inspection be arranged?
Yes. Third-party inspection is available on request and can be booked at order stage.
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Get Spiral Steel Pipe Quoted
Send the grade, size and quantity. Availability, price and lead time come back per line item.