SSAW steel pipes are a critical type of pipe used in oil and gas extraction and transportation. In addition to SSAW pipes, there are also ERW pipes and SMLS pipes; pipes produced using these two manufacturing processes are primarily designed for short-distance transportation or high-pressure, high-temperature environments. Therefore, for large-scale transportation projects, SSAW (spiral submerged arc welded) pipes are often the preferred choice.
Which manufacturers produce SSAW pipes? How should one screen Chinese manufacturers? And how can one purchase SSAW pipes that offer the best value for money? This article will break down the specifications, manufacturing key points, core advantages, and selection criteria of SSAW pipes from the perspectives of frontline procurement and engineering. Whether you are an engineer, project manager, or procurement professional, this article will help you avoid common pitfalls.
What is SSAW Steel Pipe?
SSAW (Spiral Submerged Arc Welded) steel pipe, also known as spiral submerged arc welded steel pipe, is a type of steel pipe manufactured through a spiral winding process, using submerged arc welding technology to weld the pipe joints. To put it simply, it’s like rolling a long strip of paper into a spiral tube, with the paper strip spiraling diagonally, forming a spiral line from edge to edge – that’s the spiral pipe. Submerged arc welding is a welding method: during welding, the electric arc is buried under the flux, like working with your head down, hence the name submerged arc welding.
SSAW is one of the three main types of welded pipes ( ERW , SSAW, LSAW ) used in long-distance oil and gas pipelines. Compared to LSAW steel pipes, which resemble a sheet of paper rolled into a cylinder, SSAW spiral pipes resemble a long strip of paper spirally wound into a cylinder. The weld seams of SSAW are distributed in a spiral pattern, making it more suitable for large-diameter, long-distance pipelines. Pipes manufactured using this process start at 20 inches in diameter and often exceed 100 inches.
Core Advantages of SSAW Steel Pipes
The core advantages of SSAW steel pipes lie in their large diameters, high strength, corrosion resistance, cost-effectiveness, and excellent workability. The hot-rolled coils used in SSAW production are 10–15% cheaper than medium- and heavy-gauge plates, and a single machine can achieve a daily output of 300–500 tons.
For pipes of the same specifications, SSAW steel pipes are typically 10–20% cheaper than LSAW pipes. A single spiral welded pipe production line can manufacture nearly all specifications within the 219 mm to 3020 mm range. Changing specifications requires only adjusting the forming parameters, without the need to replace dies, making it suitable for small-batch orders with multiple specifications.
The spiral weld is not straight, allowing stress to be distributed more effectively when the pipe is under load. When subjected to external loads such as soil settlement or earthquakes, spiral welded pipes demonstrate better adaptability than straight-seam pipes.
Large domestic SSAW pipe mills typically maintain a stock of 100,000–200,000 metric tons of hot-rolled coil. Standard specifications can be delivered within 15–30 days, and urgent orders can be expedited to 7–10 days. ALLLAND can provide you with a complete SSAW steel pipe solution, ensuring delivery within your project timeline.
SSAW Steel Pipe Manufacturers in China
SSAW steel pipe production lines have strict requirements and are expensive. Manufacturers equipped with these production lines are generally concentrated in Cangzhou and Suzhou, China, and SSAW pipes from other regions are typically sourced from these areas. Below, we will introduce several long-established Chinese SSAW steel pipe manufacturers with strong comprehensive capabilities:
- Shougang: Capable of producing SSAW, LSAW, and ERW steel pipes, the company holds a full range of standard certifications, has strong production capacity, and supports large-scale orders.
- HBIS Group: One of the world’s leading steel giants, their greatest strength lies in cost control.
- ALLLAND Group: Located in Cangzhou, the “hometown of SSAW steel pipes.” The company operates three production lines—SSAW, LSAW, and SMLS—as well as three coating lines, making it a high-quality manufacturer capable of integrating steel pipe production with coating and corrosion protection.
SSAW Steel Pipe Grade
| Standard Number | Scope of Application | Core Requirements | Typical Applications |
| GB/T 9711 | Oil and gas transportation | It uses API 5L, which is divided into two levels: PSL1 and PSL2. PSL2 has forced impact toughness. | West-East Gas Pipeline, China-Russia Pipeline, High-Pressure Natural Gas |
| SY/T 5037 | General fluids | Most commonly used in civilian applications, the water pressure test requirements are lower than GB/T 9711. | Urban water supply, low-pressure drainage, heating |
| API 5L | International oil and gas projects | PSL2 Forced Impact Toughness and Non-destructive Testing | Export projects, foreign-related engineering projects, and transnational pipelines |
| ASTM A252 | Pile foundation engineering | Tensile strength and straightness are required, but water pressure testing is not required. | Building pile foundations, wharf engineering, offshore wind power foundations |
| GB/T 3091 | low-pressure fluid | Basic requirements, applicable to water, air, and steam. | Fire protection pipelines, HVAC engineering, temporary pipelines |
For export projects, choose API 5L PSL2; for domestic piling, ASTM A252 is the first choice; for ordinary municipal water, SY/T 5037 offers the best cost performance.
Mechanical performance requirements
Commonly used steel grades and performance requirements for SSAW steel pipes:
| Material Grade | Corresponding Standards | Yield Strength (MPa) | Tensile Strength (MPa) | Typical Applications |
| Q235B | GB/T 700 | ≥235 | 375-500 | Low-pressure water, structural support, temporary pipelines |
| Q355B | GB/T 1591 | ≥355 | 470-630 | Medium-pressure fluids, general structures, urban pipe networks |
| L245 (Class B) | GB/T 9711 / API 5L | ≥245 | 415-565 | Natural gas gathering and transportation, low-pressure oil and gas |
| L360 (X52) | GB/T 9711 / API 5L | ≥360 | 455-620 | Medium-pressure oil and gas, long-distance pipelines |
| L415 (X60) | GB/T 9711 / API 5L | ≥415 | 520-670 | High-pressure oil and gas, main pipelines |
| L485 (X70) | GB/T 9711 / API 5L | ≥485 | 570-750 | High-strength pipelines and high-pressure transmission |
Application of SSAW Pipe
- Municipal facilities
In some large-scale infrastructure projects, such as municipal water supply, drainage, and heating pipes, SSAW steel pipes are mostly used. The inner wall is lined with a layer of cement mortar to prevent corrosion and scaling, and it can last for 30 years without any problems.
- Construction Engineering
SSAW steel pipes have uniform wall thickness, high load-bearing capacity, and are relatively economical. They provide reliable support in projects such as the supporting structures of high-rise buildings, cross-sea bridges, and highway overpass piers.
- Marine and Hydraulic Engineering
Scenarios such as seawater drainage pipes, port dredging pipelines, and land reclamation by sand filling all have high requirements for corrosion prevention. The SSAW is equipped with 3LPP heavy-duty anti-corrosion coating and cathodic protection, and it can last for more than ten years. In the field of water conservancy projects, spillway pipes of reservoirs and water diversion tunnels have high requirements for wall thickness. SSAW can achieve a thickness of over 40mm, meeting the requirements of most water head pressures.
- Energy and industrial pipelines
For medium and low-pressure oil and gas transportation, replacing LSAW with SSAW (using API 5L standard) can save significant costs. In wear-resistant applications such as coal-water slurry transportation in mines and tailings pipelines, wear-resistant linings can be used to extend service life.
For any large-scale projects such as municipal works, construction, marine engineering, and energy projects, which have large budgets, tight schedules, and require high precision, SSAW is always the preferred choice.
Allland Shows You How to Choose an SSaw Supplier
Choosing the right supplier is crucial to the success of a project. When selecting an SSAW supplier, generally consider these points:
✅ 1. Production Qualifications and Certifications
Confirm that the supplier has certifications such as API 5L / ISO / GB/T 9711, export qualifications and third-party inspection certificates, and quality system certification (such as ISO 9001).
✅ 2. Testing equipment
Does it have a raw material inspection system, production process monitoring capabilities, comprehensive non-destructive testing equipment, and traceable factory inspection records?
✅ 3. Supply Records
Does the supplier have experience in supplying large-scale projects, fast order tracking, emergency order placement capabilities, and experience in coordinating sea/land transportation?
✅4. Client Cases and Industry Reputation
Review the supplier’s performance in oil pipeline projects, feedback on cooperation in water projects, and the fulfillment rate of international orders.
✅5. Technical support and after-sales service
Qualified suppliers should provide selection advice and technical optimization solutions, on-site technical support, and after-sales consultation and support.
Conclusion
Spiral Submerged Arc Welded (SSAW) steel pipe production capacity exceeds 30 million tons, accounting for more than 60% of the global total, making it the world’s largest producer and consumer of steel pipes. In recent years, although many new, efficient, and high-quality welding methods have emerged, the application areas of SSAW have remained unaffected. SSAW uses the most economical raw materials, the most flexible methods, and the lowest cost to produce excellent large-diameter steel pipes. As the world’s largest SSAW steel pipe production base, China possesses a complete industrial chain, providing global customers with a stable, efficient, and traceable supply chain guarantee.
Located in Cangzhou, Hebei Province, ALLLAND offers a complete range of services from steel coils and welding materials to anti-corrosion coatings. Holding API, ISO, AWWA, and CE certifications, we can handle large-scale project orders. With convenient port access and extensive experience in sea freight exports, ALLLAND is a professional steel pipe supplier with long-term partnerships with leading domestic steel mills and over 15 years of export experience in SSAW steel pipes. For technical consultation or quotations, please contact our sales team.