Our high-quality SPRIAL SAW PIPE are manufactured from hot-rolled steel coils or plates, formed in a spiral configuration and welded using double-sided multi-wire automatic submerged arc welding (SAW). Featuring large diameter capability, flexible length, cost-effectiveness, moderate pressure resistance, and high automation, SPRIAL SAW PIPE are widely used in medium-to-low pressure oil & gas gathering lines, municipal networks, water conservancy, structural supports, power transmission towers, and pile foundations. Compared to LSAW pipes, SSAW is ideal for large-diameter, long-distance, non-extreme high-pressure applications with economic advantages.
Key Features
Standards:
International:
API 5L (46th Ed. or later): PSL1 & PSL2 for oil & gas transmission;
ISO 3183: Equivalent to API 5L;
EN 10217-1/-2: Welded steel tubes for pressure purposes;
Chinese:
SY/T 5037: For general fluid transport (water, air, gas);
GB/T 9711: For oil & gas pipelines (PSL1/PSL2);
GB/T 3091: Reference for low-pressure applications;
Custom: Available per MDS, SPEC, or ASME B31.3/B31.8.
ASTM A139 – Standard Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service
Materials:
Carbon Steels:
Q235, Q355 (GB/T 1591);
L245–L415, X52–X80 (API 5L PSL1/PSL2);
S235JR, S235J0, S235J2, S235K2, S355JR,JO, S355J2, S355K2,Q235, Q355,Q460,Q690
Special Requirements:
Sour Service: L360QS, L415QS (NACE MR0175 / ISO 15156);
Low-Temperature Toughness: Impact tested at -20°C;
Z-Toughness: Z15/Z25 plates available;
Steel coils/plates from Baosteel, Ansteel, Shougang, Handan Steel, ensuring stable quality.
Dimensions:
OD: 219 mm – 4000 mm (8" – 157.48")
WT: 6 mm – 30 mm (thicker on request)
Length: 6m, 12m, up to 150m
Tolerances (SY/T 5037 / API 5L PSL1):
OD: ±0.75%D or ±8mm
WT: +10% / -10%
Ovality: ≤1.0%D
Straightness: ≤0.3% of length
Applications:
Oil & Gas Gathering Lines: Field pipelines, regional gas distribution;
Municipal Water Supply & Drainage: Main water/sewer lines;
Water Conservancy: Irrigation, pump stations, pressure tunnels;
Power & Telecom: Transmission towers, cable conduits;
Infrastructure: Bridge piles, wharf fenders, building supports;
Industrial Systems: Air, steam, cooling water mains.
Certifications:
Classification Society Approvals:
CCS, ABS, DNV, BV, LR material & factory approval;
MTC (Type 3.1/3.2) with class stamp, third-party inspection supported;
End-User & EPC Qualifications:
Owners: CNPC, CNOOC, Sinopec, PipeChina, State Grid, China Southern Grid, China Resources Gas, Beijing Enterprises Water;
EPCs: CPECC, COOEC, PowerChina, AVIC, Worley, Fluor;
Supplied to West-East Gas Pipeline branches, South-to-North Water Diversion, coastal water supply, offshore wind foundation piles.
Quality & System Certifications:
API 5L Monogram License
ISO 9001:2015, ISO 14001:2015, ISO 45001:2018
PED 2010/35/EU (CE Mark)
Full Traceability: From coil heat number to final inspection
Common Customer Questions (Q&A Format)
Q: Are your spiral pipes SAW welded? How do they differ from LSAW?
A: Yes, using double-sided multi-wire SAW. SSAW has a spiral seam, suitable for large-diameter, long-distance, medium-pressure projects, with lower cost than LSAW.
Q: Do you comply with API 5L? Can it be used in main oil/gas lines?
A: Yes, compliant with API 5L PSL1/PSL2. Suitable for branch lines; can be used in main lines under specific conditions (e.g., X52/X60, PSL2).
Q: What is your maximum OD? Can you produce pipes over DN2000?
A: Max OD: 4000mm (157.48"). Yes, we produce DN2000, DN2400, DN2600 and bigger for water and municipal projects.
Q: Can you supply X70 grade? What about low-temperature performance?
A: Yes, grades up to X70 available and higher steel grade X80, X90, X100 . Impact tested at -20°C for cold regions.
Q: Are you approved by PipeChina , CNPC and other Oil/Gas company?
A: Yes, qualified by PipeChina, CNPC, CNOOC,Shell, ADNOC, NNPC,IOGC listed in approved vendor lists.
Q: What is the lead time? Do you have stock for common sizes?
A: Lead time: 30–60 days. Common sizes (X52/GR B DN200–DN500) partially in stock.
Q: Do you provide NDT reports (UT, RT)?
A: Yes. All welds can be inspected by UT and RT for internal defects.
Q: Can you manufacture per customer MDS or SPEC?
A: Yes. Custom production with FBE/3LPE/3PP coating, cement lining, etc.
Q: Suitable for offshore wind piles or bridge foundations? Can you support class survey?
A: Yes. Widely used in offshore wind and bridge piles. We support CCS, ABS, DNV inspections.
Q: What is your export packaging?
A: Rust preventive oil, plastic end caps, steel strapping, marine frames. Each pipe marked with grade, heat no., size, standard-compliant with API RP 5L1.
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