-
Industries OverviewThe company's products are primarily used in industrial equipment sectors such as nuclear power, petroleum, petrochemicals, chemical engineering, power generation, automotive manufacturing, shipbuilding, fertilizer production, pharmaceuticals, papermaking, sugar refining, and machinery manufacturing. -
Products & SolutionsOur Products: Ferrous metal ore raw materials (nickel ore, ferronickel, ferrochrome, ferromanganese, ferrosilicon, etc.), seamless pipes, welded pipes, medium-thick plates, plate coils, bars, wire rods, wire coils, pipe fittings, flanges, castings, etc. -
CommunityThe company has established an excellent reputation within the industry through its strong credibility, comprehensive services, and ample resources. -
Process VisualizationThe company's products are primarily used in industrial equipment sectors such as nuclear power, petroleum, petrochemicals, chemical engineering, power generation, automotive, shipbuilding, fertilizer production, pharmaceuticals, papermaking, sugar refining, and machinery manufacturing. -
About UsTsisco Industrial Ltd. was established in 2010. Originating from the Tsingshan ecosystem’s Shanghai platform, the company now operates independently and focuses on global supply-chain integration, distribution, and import/export of steel and alloy materials. We achieved ISO 9001 certification from TÜV Rheinland in 2012, and ISO 9001, ISO 14001 and ISO 45001 certifications from LRQA in 2022. These accreditations underpin continuous improvement and stable performance in quality, environment, and occupational health & safety.
-
Products & Solutions
Spiral Submerged Arc Welded Pipes
Spiral Submerged Arc Welded Pipes
Spiral Submerged Arc Welded Pipes｜Global Sourcing for Engineering & Procurement
1. Product Positioning and Application Scope
Spiral welded pipes are large-diameter steel pipes formed from strip/coil with a helical seam welded by inner and outer submerged arc welding. They offer broad diameter coverage, cost efficiency and flexible lengths, and are suitable for long-distance water transmission, onshore crude oil and natural gas pipelines, seawater intake and outfall as well as cooling water, piling and structural uses, city gas trunk mains, and sewage/slurry conveyance. For high-pressure oil & gas, harsh offshore service or owner-specific rules, LSAW or seamless may be mandated; follow the project specification and design check as the governing principle. AWWA C200 (water), ISO 3183 and API 5L (line pipe), EN 10224 (water) and SY/T 5037 (ordinary fluid service in China) are the mainstream standards for this product family.
2. Standards Matrix (by application system)
a) Water and municipal
AWWA C200 for steel water pipe; C205 cement-mortar lining; C210 epoxy lining/coating for potable and general water; C213 fusion-bonded epoxy (FBE); C214/C215 tape wrap; C222 polyurethane. Design guidance: AWWA M11.
b) Oil & gas
API 5L line pipe (PSL1/PSL2), ISO 3183 (companion/intended equivalent to API 5L), often combined with ASME B31.4/B31.8 and API 1104 for construction and acceptance.
c) European & international general
EN 10224 for drinking and general water; EN 10217 series for welded pressure tubes (project-based); ISO 21809 pipeline coatings (e.g., 3LPE/3LPP and FBE) and ISO 21809-3 for field joint coatings.
d) China & North America
GB/T 9711 for oil & gas transportation; SY/T 5037 for ordinary fluid service spiral SAW pipes; AWWA family per item (a). Canada may follow CSA Z245.1 aligned with ISO 3183 (project-based).
3. Scene–Material–Standard–Size Mapping (text form)
1. Raw and treated water trunk mains (buried or on pipe racks)
Material: Carbon line pipe grades L245–L415 (GB/T 9711) or API 5L Grade B–X60.
Standards: AWWA C200 + C205 lining, external C213 or 3LPE; or EN 10224 + ISO 21809.
Size: DN 800–DN 3000 typical; WT 6–20 mm; length 6–18 m.
2. Seawater intake/outfall and industrial cooling water
Material: L290–L450; control S and toughness as required.
Standards: AWWA C200 + C210 epoxy (or C205 mortar) internally; 3LPE/3LPP externally + cathodic protection.
Size: DN 600–DN 2600; wall thickness by surge/external pressure checks.
3. Onshore crude oil & natural gas trunk lines (medium to high pressure)
Material: API 5L PSL2 X52–X70 (or GB/T 9711 L360–L485) with toughness matching.
Standards: API 5L/ISO 3183 PSL2 (Charpy, DWTT, CTOD per project); external ISO 21809 system.
Size: OD 508–1422 mm common; WT 6.4–25.4 mm.
4. City gas trunk and district energy networks (medium pressure)
Material: L245–L360 or API 5L Grade B–X52.
Standards: API 5L PSL1/PSL2 or AWWA C200 depending on medium and regulation; coating and flanging per local codes.
Size: DN 400–DN 1200.
5. Sewage, slurry and tailings
Material: L245–L360; heavy-wall for abrasion; optional polyurethane or ceramic lining.
Standards: AWWA C200 + C222 polyurethane or project lining spec.
Size: DN 400–DN 1800.
6. Offshore & near-shore piling, conductors and structural members
Material: S355JR/J2, API 5L X52–X65 per structural/fatigue criteria; expand and circumferential UT as required.
Standards: Project structural codes (e.g., DNV) + manufacturing/NDE clauses; pipelines may prefer LSAW while piling can use SSAW.
Size: OD 914–3000 mm; WT 12–40 mm (by design).
7. District cooling/heating return mains
Material: L245–L360.
Standards: AWWA C200 + C210 or C205; external C213 or 3LPE, add insulation if needed.
Size: DN 400–DN 1600.
8. Special cases (siphons across rivers, vacuum/negative pressure segments)
Material: Thicker section with stiffeners by FEA.
Standards: AWWA M11/project special; stability checks for external pressure/vacuum.
4. Size Range and Tolerances (per adopted standards)
OD: typically 406–3620 mm; some mills up to ~4064 mm. WT: ~4.0–25.4 mm (by grade and service). Length: 6–18 m (project cut lengths available). Ends: bevel per ASME B16.25. Dimensional and geometric tolerances follow the adopted standards, e.g., API 5L/ISO 3183 on wall thickness minus tolerance, OD/out-of-roundness, straightness and end squareness; AWWA C200 and EN 10224 contain corresponding clauses.
5. Manufacturing Flow and Key Controls
Coil/plate → edge milling → spiral forming → inner & outer SAW → on-line UT/RT of seam → expansion & sizing (as applicable) → hydrotest → end beveling → dimensional & visual checks → internal lining/external coating (as applicable) → marking & packing. Critical controls: coil cleanliness and chemistry consistency; heat input and qualified WPS/PQR; PSL2 toughness and DWTT where required; 100% hydro and 100% weld NDE coverage; expansion to control residual stress; coating/lining DFT and holiday testing per AWWA/ISO 21809.
6. Quality Inspection and Documentation
Scope includes chemistry and mechanicals, impact (PSL2/project), DWTT (large OD oil & gas), dimensions/geometry, full-length hydro, weld UT/RT/MT, coating/lining DFT and holiday tests. Documentation: EN 10204 3.1/3.2, welding/heat-treat records, NDE reports, hydro records, coating QA/QC and third-party witnessing if required.
7. Supply Forms and Packing
Supplied as bare pipes or beveled pipes, with end rings or spools; internal mortar (C205) or epoxy (C210); external FBE (C213), 3LPE (ISO 21809), tape wrap (C214/C215) or polyurethane (C222). Protection with end caps, lifting/stacking bracing, anti-scuffing pads and full traceable marking.
8. RFQ/PO Checklist
a) Standard & edition: AWWA C200 + C205/C210/C213 (or API 5L/ISO 3183 PSL level, EN 10224, etc.).
b) Grade & condition: L245–L555 (GB/T 9711) or Grade B–X70 (API 5L), PSL2 yes/no, expansion yes/no.
c) Dimensions & ends: OD × WT × length; bevel per ASME B16.25; limits on out-of-roundness, straightness and end squareness.
d) NDE & tests: 100% weld UT (or RT), full-length hydro, impact/DWTT ratio per drawings.
e) Lining & coating: system/standard, target DFT, adhesion and holiday acceptance.
f) Documentation & surveillance: EN 10204 3.1/3.2, TPI, dossier list.
9. Selection Guide (text)
Water & reuse lines: AWWA C200 + C205; external C213 or 3LPE; DN 800–DN 3000.
Seawater/high chlorides: C200 + C210 or C205 + 3LPP, with cathodic protection; match corrosion resistance of flanges/bolting.
Onshore O&G: API 5L PSL2 X52–X70; ISO 21809 external; DWTT per design.
Sewage & slurry: heavy-wall with C222 or project lining spec.
Offshore piling/structural: follow DNV/project structural codes; consider fatigue & welding details; shift to LSAW if mandated.
10. Procurement, Construction & O&M Risk Notes
Do not confuse AWWA Class with ASME Class; do not mix gasket/flange systems.
PSL1 vs PSL2 have significant differences; use PSL2 for trunk O&G lines.
Buried lines require cathodic protection and insulating joints; coatings do not replace CP.
Negative/external pressure without stability checks can lead to collapse; siphons need special design.
Field joints and repairs must follow ISO 21809-3 or AWWA rules to avoid bare steel exposure.
11. Representative Spec Lines (ready to paste)
1. Raw-water transmission:
“Pipe, AWWA C200, DN 1600, L = 12 m; C205 cement-mortar lining; external AWWA C213 FBE prime + 3LPE; bevel per ASME B16.25; hydro ≥1.5×DP; holiday-free; docs EN 10204 3.2.”
2. Onshore O&G trunk line:
“Line Pipe, API 5L PSL2 X65, OD 914 mm × WT 17.5 mm × L 12 m; 100% weld UT; impact & DWTT per drawings; external ISO 21809-1 3LPE; holiday-free; docs 3.2.”
3. Seawater intake/discharge:
“Pipe, AWWA C200, DN 2200; internal AWWA C210 epoxy; external 3LPP; CP by EPC; flanges per EN 1092; docs 3.1.”
4. Piling:
“Pile Pipe, SSAW, S355J2, OD 2000 mm × WT 20 mm × L 18 m; circumferential weld UT; end stiffening ring; coating per project marine system.”
12. Representative Global Producers (alphabetical, examples)
American SpiralWeld Pipe (USA, AWWA water transmission).
Borusan Mannesmann (Türkiye, HSAW portfolio).
Corinth Pipeworks (Greece, HSAW/LSAW pipelines).
East Pipes Integrated Company (Saudi Arabia, HSAW for water & O&G).
Jindal SAW (India, HSAW/LSAW for pipelines & water).
Northwest Pipe Company (USA, AWWA C200 spiral-weld steel water pipe).
Welspun Corp (India, global HSAW projects).
Erciyas Steel Pipe (Türkiye, large-diameter HSAW).
Spiral Submerged Arc Welded Pipes ｜Technical Specifications
1) Definition & Scope
SSAW/SAWH/HSAW pipes are formed from hot-rolled coil at a helical angle and welded by internal and external submerged arc processes. They suit large OD, medium-thick wall transmission and structural applications: long-distance water/return lines, crude/product pipelines (subject to Owner approval), piles for ports/bridges, structural columns/casings, offshore conductors/protective piles, etc.
2) Standards Matrix (by application/region)
• Line pipe: API 5L (PSL1/PSL2) / ISO 3183; China GB/T 9711 (L245–L555); Canada CSA Z245.1; offshore refer to DNV-ST-F101 where applicable.
• Water works: AWWA C200 (steel water pipe ≥150 mm); linings/coatings per AWWA C205/C210/C213/C222.
• Piles/Structural: ASTM A252, JIS A5525; structural hollow sections per EN 10219.
• General fluids: SY/T 5037, GB/T 3091 (low/medium pressure).
• Factory coatings: DIN 30670 (3LPE), DIN 30678 (3LPP), CSA Z245.20 (FBE), AWWA C210/C213/C222; (projects may reference ISO 21809 family as an umbrella).
3) Materials & Grades
• Line pipe: B/L245, X42/L290, X46/L320, X52/L360, X56/L390, X60/L415, X65/L450, X70/L485 (X80/L555 subject to dedicated qualification).
• Pile/Structural: Q235/Q345/S355; ASTM A252 Gr.2/Gr.3.
• Coil requirements: low P/S and inclusion control; tensile/impact to spec; microalloying (Nb/V/Ti) balanced with weldability (CE/CET).
4) Manufacturing & Process Controls (typical SSAW route)
1. Coil incoming inspection (chemistry, tensile, UT for lamination).
2. Uncoiling—leveling—slitting; edge quality control.
3. Edge milling for stable fit-up land and gap.
4. Helical forming (typ. 30°–75°).
5. Double-sided SAW (ID then OD), flux baking and reuse control; HI/interpass governed.
6. In-line/off-line NDE: full-length UT of seam; RT/DR where required; body UT sampling.
7. Mechanical expansion/sizing to reduce residual stress and ovality.
8. Hydrotest per standard (stress/hold/acceptance).
9. End finishing: 30°±2.5° bevel with ~1.6 mm land (project/standard prevailing); spatter removal.
10. Coating/lining as ordered (3LPE/3LPP/FBE/liquid epoxy/cement mortar).
11. Marking & traceability: heat/lot, grade/PSL, dimensions, inspection status, coating system/thickness.
5) Size Range & Tolerances (typical; PO prevails)
• OD ≈ 219–3620 mm (some mills up to ~4064 mm).
• WT ≈ 5–25.4 mm (piles up to ~40 mm depending on mill/grade).
• Length 6–12 m (SRL/DRL), up to ~18 m; longer by field joints.
• Typical tolerances: OD ±0.5%·D (or per standard); min WT ≥ 87.5% of nominal (negative deviation controlled); ovality ≤1.0%·D; straightness ≤0.2%·L; end squareness ≤1.6 mm; mismatch/reinforcement per standard/PO.
6) Qualification & Testing (PSL2/engineering level)
• Mechanical/toughness: BM/WM/HAZ tensile; CVN at specified temperature; DWTT recommended for gas transmission.
• Weld NDE: full-length UT; RT/DR at critical locations; CTOD/fracture where specified.
• Hydrotest: every length; standardized hold/acceptance criteria.
• Sour service: HIC (NACE TM0284)/SSC (TM0177) when applicable; hardness control.
• Geometry: OD, min WT, ovality, end squareness, bevel/land, mismatch, internal/external bead conditioning.
• Documentation: EN 10204 3.1/3.2 MTC; WPS/PQR; filler/flux batch certificates; NDE, hydrotest charts; coating QA (DFT/adhesion/holiday).
7) Coatings & Linings (selection & QA)
• External: 3LPE (DIN 30670), 3LPP (DIN 30678), FBE (CSA Z245.20/AWWA C213), or metallic spray/thermal-spray Zn-Al for piles/offshore.
• Internal: liquid epoxy (AWWA C210) for friction and corrosion control; cement-mortar lining (AWWA C205) for raw/treated water.
• QA: DFT, holiday testing, adhesion, cathodic disbondment; observe cure/handling temperature windows.
8) Quick Mapping: Service → Material → Standard
• Water transmission/return: AWWA C200 + C205 (or C210); external 3LPE/FBE; design for water hammer/seismic loads.
• Crude/product: API 5L PSL2 (X52/X60/X65 typical); 3LPE external; internal flow epoxy.
• Mid-pressure gas (onshore): Owner approval required if SSAW; limit to ≤X65/X70 with CVN/DWTT; for high-pressure/subsea/cold regions prefer LSAW/HFW.
• Offshore piles/conductors: ASTM A252/JIS A5525; wall up to ~40 mm; external metallic spray + topcoat or 3LPP.
• Structural columns/casings: choose D/T, stiffeners and joint method by stability and erection method.
9) RFQ/PO Checklist
1. Standard & level (API 5L/ISO 3183 PSL1/PSL2; AWWA C200; ASTM A252; GB/T 9711; SY/T 5037).
2. Grade & toughness (e.g., L415/X60; impact temp for piles).
3. Size & length (OD × WT × L; D/T limits; SRL/DRL/18 m).
4. Process controls (SSAW ID+OD SAW; mechanical expansion; mismatch/reinforcement limits).
5. Inspection plan (full-length UT; RT/DR where specified; CVN/DWTT; hydrotest each; HIC/SSC for sour).
6. Geometric tolerances (OD/min WT/ovality/straightness/squareness; bevel & land).
7. Coating/lining (3LPE/3LPP/FBE/C205/C210, layer thicknesses, holiday voltage/criteria).
8. Docs & traceability (MTC 3.1/3.2; WPS/PQR; filler/flux; NDE/hydro; coating QA; marking/heat trace).
9. Special clauses (field induction bends; crack arrestors; offshore CTOD; seismic/permafrost).
10) Construction & Acceptance Risk Controls
• Fit-up: verify end squareness/ovality; control mismatch; bevel/land consistent with welding procedure.
• Coating protection: slings/saddles; ISO 21809-3 (or Owner) for field joints.
• Hydro/cleaning: final dimension check; pigs per bending radius and D/T.
• Galvanic & CP: isolation kits; CP design and monitoring.
• Temperature windows: transport/storage/welding/coating curing limits; preheat/PHI as required.
11) Global SSAW Industry Clusters & Representative Companies (examples; verify during pre-qual)
• North America
• American SpiralWeld Pipe (AMERICAN) — spiral-welded steel water pipe. Source: company page “Spiral-Welded Steel Pipe”.
• Northwest Pipe Company — engineered steel water pipe / SpiralWeld line. Sources: product/news pages.
• Jindal Tubular USA — HSAW large diameter pipe. Source: product page.
• Welspun Tubular LLC (USA) — HSAW. Source: site page.
• Middle East
• Group Five Pipe Saudi — HSAW/SSAW lines and capacities (largest in region). Source: investor presentation.
• Europe/Türkiye
• Borusan Mannesmann — spirally-welded large diameter pipes (Turkey & Alabama, USA). Source: company page.
• China
• Clusters: Tianjin, Cangzhou (Hebei), Shandong, Jiangsu river belt, Sichuan (combined SSAW + coating yards).
• Youfa Group — SSAW among other products. Source: official site.
• Cangzhou Spiral Steel Pipe Group — SSAW/coating offering (for reference). Source: company page.
Note: Above are illustrative for market survey and pre-qualification; verify current certifications (ISO/PED/ASME/3.2, Owners/Water authorities) and comparable references.
12) Delivery, Marking & Logistics
• Supply: bare/coated; end caps; internal bracing if needed.
• Marking: grade/PSL, dimensions, heat/lot, coating system; bundle/single barcodes.
• Handling: saddles/soft slings; dunnage and soft pads for coated areas; fit for sea/rail/road.
13) Ready-to-Paste Spec Lines
• Water trunk: AWWA C200 + C205 lining + C210 external; SSAW, ME; OD 1626 mm × WT 12.7 mm × L 12 m; 100% UT seam; hydrotest each; external 3LPE ≥2.5 mm; include MTC and DFT/holiday reports.
• Product line (onshore): API 5L PSL2 L415 (X60); SSAW, ME; OD 813 mm × WT 12.7 mm × L 12 m; WM/HAZ CVN 27 J@−20 °C; 100% UT; external 3LPE; internal flow epoxy ≥300 µm.
• Port pile: ASTM A252 Gr.3; SSAW; OD 1422 mm × WT 25.4 mm × L 18 m; ring/boot per IFC; external thermal-spray metal + top coat or 3LPP; full geometry checks.
14) Selection Notes vs. LSAW/HFW
• Prefer SSAW: large-OD water/return lines, piles/structural, mid-pressure liquid lines where permitted.
• Use caution: high-pressure gas, subsea trunklines, cold regions, and projects with strict crack-propagation control—typically favor LSAW/HFW unless Owner approves SSAW with enhanced controls.
• Principle: obey Owner/project spec hierarchy; align material—manufacture—inspection—coating coherently.
Tags:
