Custom Fire Fighting Pipes,Seamless and Welded Steel Pipes Manufacturer Since 1991.
LSAW & SSAW
Baolai Group offers high-quality LSAW steel pipes, manufactured to meet ASTM, API, JIS, GOST, and EN standards. Our LSAW pipes are designed for medium and high-pressure applications, including oil and gas pipelines, water pipelines, and construction piling. With superior strength and durability, our LSAW steel pipes are ideal for demanding industrial services. Manufactured using advanced submerged arc welding (SAW) techniques, our pipes provide excellent pressure resistance and consistent weld integrity. We also offer SSAW pipes for low-pressure applications. Baolai is committed to quality, with API, JIS, CE, and ISO certifications ensuring the reliability of every pipe. Trust Baolai for your welded steel pipe needs, with competitive pricing and dependable supply.
Download DOC:📌PDF File
FAQ
1. What is the difference between LSAW and SSAW steel pipe?
▼
LSAW steel pipe is formed from steel plate and welded along a longitudinal seam, while SSAW steel pipe is formed from steel coil with a spiral weld. LSAW is often considered for projects requiring thicker walls, tighter dimensional control, or specific large-diameter line pipe grades. SSAW can be a cost-effective option for large diameters and long pipeline or piling projects. The final choice should consider the applicable standard, diameter, wall thickness, design pressure, inspection requirements, and project budget.
2. Which standards are used for LSAW and SSAW pipes?
▼
The standard depends on the application. API 5L is commonly specified for oil and gas line pipe, ASTM A252 for steel pipe piles, EN 10219 for structural hollow sections, and EN 10217-5 for submerged arc welded steel tubes used in pressure applications. Buyers should select the standard according to the design code, service conditions, destination-market requirements, steel grade, and required inspection level rather than the welding method alone.
3. Can SSAW pipe be used for pressure pipelines?
▼
SSAW pipe may be used for certain pressure pipelines when it complies with the specified line pipe or pressure pipe standard and is accepted by the project design code. Its suitability depends on the steel grade, diameter, wall thickness, design temperature, corrosion allowance, weld quality, and required testing. LSAW should not automatically be considered suitable for higher pressure simply because it has a longitudinal weld.
4. How are LSAW and SSAW weld seams inspected?
▼
Inspection may include raw-material traceability, dimensional checks, visual weld examination, ultrasonic or radiographic testing, mechanical testing, and hydrostatic testing. Coated pipe may also require surface preparation, coating-thickness, adhesion, and holiday inspections. The exact methods, coverage, sampling frequency, and acceptance criteria should follow the specified standard and the approved inspection and test plan.
5. What information is needed when ordering LSAW or SSAW pipe?
▼
An LSAW or SSAW pipe RFQ should include the application, applicable standard, steel grade, outside diameter, wall thickness, length, quantity, design pressure and temperature where relevant, and required pipe ends. Buyers should also specify coating or lining, weld inspection, hydrostatic testing, MTC, third-party inspection, packaging, and destination requirements. These details help determine whether LSAW or spiral welded steel pipe is more suitable and reduce specification changes after production begins.
