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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.
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Products & Solutions
Stainless Seamless Pipes & Tubes
Stainless Seamless Pipes & Tubes
Stainless Seamless Pipes & Tubes ｜Global Sourcing for Engineering & Procurement
1. Product Definition & Scope
• Definition: Seamless stainless steel pipe covering austenitic, ferritic, martensitic, duplex and super-duplex families for process piping, boilers and heat exchangers, seawater and high-chloride media, cryogenic, sanitary and ultra-pure services, nuclear and hydrogen applications.
• Scope: Straight lengths, U-tubes, small-bore instrumentation tubing and thick-wall high-pressure pipe; optional solution anneal, HRAP finish, machined bevels and clean packaging.
2. Standards Matrix (Global, with clear applicability)
Note: “Pipe” vs “Tube” follows each standard’s own definition. ASME “SA” editions are listed where Code stamping is required.
1. General requirements & dimensional series
• General requirements (Pipe): ASTM A999.
• General requirements (Tube): ASTM A1016.
• Dimensional series: ASME B36.19M (stainless pipe), ASME B36.10M (carbon steel reference), ISO 1127 (SS tube dimensions & tolerances).
• Certificates: EN 10204 3.1 or 3.2.
• Cross-material note: ASTM A450 applies to carbon/low-alloy steel tubes only; cite in mixed-material projects with scope clearly separated from stainless.
2. Stainless seamless “Pipe”
• ASTM A312 / ASME SA312 (austenitic stainless for process and line service; seamless and welded exist—specify “seamless only” on PO).
• ASTM A790 / ASME SA790 (duplex & super-duplex for process and line; seamless and welded exist—specify “seamless only”).
• ASTM A376 / ASME SA376 (austenitic stainless seamless pipe for high-temperature services in power plants).
3. Stainless seamless “Tube”
• ASTM A213 / ASME SA213 (ferritic and austenitic seamless tubes for boiler, superheater and heat-exchanger service).
• ASTM A269 (general service austenitic tubes, seamless/welded; often used for process/instrumentation—specify “seamless only” if required).
• ASTM A789 (duplex seamless/welded tubes for general service—specify “seamless only” if required).
• ASTM A270 (sanitary seamless/welded tubes; pharmaceutical, food & beverage, with defined Ra and cleanliness).
• ASTM A511 (seamless stainless mechanical tubing; shafts, sleeves, structural).
• ASTM A632 (small-diameter austenitic seamless/welded tubing for instrumentation and general service).
4. EN / GB / JIS equivalents (stainless seamless)
• EN 10216-5 (pressure purposes, stainless seamless), EN 10297-2 (general engineering, stainless seamless).
• GB/T 14976 (fluid service), GB/T 13296 (boiler & heat exchanger), GB/T 14975 (structural service).
• JIS G3459 (general service), JIS G3463 (boiler & heat exchanger).
5. Nickel & corrosion-resistant alloys (extension for extreme media)
• Typical: ASTM B163, B167, B444, B423 (Inconel/Alloy 600, 625, 825, etc.). Use when stainless is insufficient; keep scope explicit in the technical agreement.
3. Quick Mapping: Service — Material — Standard — Size (copy-ready)
1. Utilities (water, inert gas, low-pressure steam)
• Materials: TP304/TP304L, TP316/TP316L.
• Standards: Pipe A312; for light-wall/small-bore use A269.
• Sizes: OD 6–610 mm; B36.19M schedules 5S/10S/40S/80S; 6 m or 12 m typical.
2. Boilers, superheaters & heat exchangers
• Materials: TP304H, TP321H, TP347H, TP316H, 310S.
• Standards: Tube A213; U-tubes per A213 with bend radius, leg length and heat treatment stated.
• Sizes: OD 12.7–50.8 mm, WT 1.2–5 mm; straight 6–24 m, U per drawing.
3. Seawater & high-chloride media
• Materials: Duplex 2205 (S32205), Super-duplex 2507 (S32750/S32760); 904L or 6Mo (S31254) as needed.
• Standards: Pipe A790, Tube A789; dimensions per B36.19M or ISO 1127.
• Sizes: OD 19–323.9 mm, Schedules 40S/80S common; ID pickling/passivation recommended.
4. Strong acids / mixed acids / oxidizing chlorides
• Materials: Prefer duplex/super-duplex; escalate to Ni-based (Alloy 625/C-276) when required.
• Standards: Stainless via A790/A789; if Ni-based, cite B444/B622 etc. with scope defined.
• Sizes: Typically OD 12.7–168.3 mm per process design.
5. Cryogenic (LNG/LPG/LH₂/LN₂)
• Materials: TP304L, TP316L.
• Standards: Pipe A312; exchanger circuits may use A213.
• Sizes: OD 6–323.9 mm; beveling/welding to meet impact and He-leak criteria where applicable.
6. Sanitary & ultra-pure
• Materials: 316L (controlled S), electropolished if required.
• Standards: A270 with ASME BPE surface grades and clean packaging.
• Sizes: OD 12.7, 19.05, 25.4, 38.1, 50.8 mm common; specify ID Ra and packaging in PO.
7. Instrumentation & small-bore
• Materials: 304L, 316L, Duplex 2205.
• Standards: A269 (general), A632 (small-diameter), A789 (duplex).
• Sizes: OD 3.18–25.4 mm, WT 0.5–3 mm.
8. High-T, high-pressure main steam / hot reheat
• Materials: TP321H, TP347H, 310S as per stress/temperature.
• Standards: A376 (high-T pipe) or A213 (exchanger side).
• Sizes: OD 60.3–323.9 mm; wall per design and B36.19M selection.
9. Structural / mechanical uses
• Materials: 304, 316, 410, 420, 431 as required.
• Standards: A511 (seamless mechanical tubing).
• Sizes: OD 20–273 mm, WT 3–30 mm.
4. Sizes & Tolerances (contractual)
• Range: OD 6–610 mm; lengths 6 or 12 m typical; U-tubes per drawings.
• Wall series: ASME B36.19M 5S/10S/40S/80S/160; or ISO 1127 and EN 10216-5 tolerance grades (D/T).
• Tolerances & shape: OD/WT, ovality, eccentricity, straightness per A999 or A1016; bevel geometry per project (e.g., 30° with 2 mm land); sanitary orders to state Ra and clean bagging.
5. Manufacturing & QA (highlights)
• Route: EAF/AOD/VOD → hot pierce & hot-roll or extrusion → cold finishing (as needed) → solution anneal → pickling/passivation → straightening & cut-to-length → end finishing & clean pack.
• Basic exams: Chemistry (OES/ICP), mechanicals (YS/UTS/Elongation/Hardness), hydro or equivalent NDE (UT/ET), dimension & surface.
• Special exams: Austenitic IGC per ASTM A262; duplex phase balance & detrimental phases per ASTM A923 with ASTM G48 pitting; 100% PMI where mix-up risk exists.
• Documentation: EN 10204 3.1/3.2, HT charts, NDE reports, full heat/lot traceability.
6. RFQ / PO Checklist (copy-ready)
1. Standards & editions: A312, A213, A269, A789, A790, A270, A376, A511, A632; specify “seamless only”.
2. Material & condition: Grade (e.g., TP316L, S32205), solution-annealed HRAP; electropolish & cleanliness if needed.
3. Size & tolerance: OD × WT × Length; schedule (5S/10S/40S/80S/160) or ISO 1127 grades; straightness/ovality/eccentricity limits.
4. Ends & cleanliness: Bevel geometry and land; ID/OD Ra; sanitary/UPW to specify double bag and end caps.
5. Exams: Hydro or UT/ET equivalence, A262 or A923/G48, PMI coverage, He-leak and particle cleanliness if applicable.
6. Docs & witnessing: EN 10204 3.1/3.2, HT curves, original NDE, third-party witnessing scope.
7. Applicability note: If non-stainless materials are included on the project, A450 may be cited for those items with scope segregation.
7. Representative Spec Lines (edit as needed)
• Process piping (austenitic): “Pipe, ASTM A312 TP316L, Seamless, 4 in × Sch40S × 6 m, Solution Annealed & Pickled, Bevel 30° × 2 mm land, Hydro or UT per A999, EN 10204 3.1, 100% PMI at alloy mix points.”
• Seawater loop (duplex): “Pipe, ASTM A790 S32205, Seamless only, 6 in × Sch80S × 6 m, Solution Annealed & Pickled, ASTM G48 Method A as specified, 100% PMI, EN 10204 3.1.”
• Exchanger U-tube: “Tube, ASTM A213 TP321H, Seamless, OD 19.05 mm × WT 2.11 mm, U-bend R=1.5D, Post-bend Solution Anneal, Eddy Current per A1016, EN 10204 3.1.”
• Sanitary line: “Tube, ASTM A270 316L, Seamless only, OD 25.4 mm × WT 1.65 mm × 6 m, ID Ra ≤ 0.5 μm, Pickled & Passivated, Cleanroom Bagging, ASME BPE compliance + EN 10204 3.1.”
Stainless Seamless Pipes & Tubes ｜Technical Specifications
1) Product Overview
• Definition and scope: Seamless stainless steel pipe and tube supplied as hot-finished or cold-finished, in solution-annealed (SA) or bright-annealed (BA) condition, for pressure piping, boilers and heat exchangers, instrumentation and utility services, high-purity systems, and corrosive or high-temperature duties. Mechanical/structural tubes are included where applicable.
• Typical manufacturing routes: Piercing and hot rolling (mandrel/plug/Assel), hot extrusion (mother tube), cold drawing or cold pilgering to final size, followed by heat treatment and straightening. Bright anneal for high-purity lines.
• Applicability highlights: Chloride-bearing media, seawater, acids/alkalis, oxidizing or reducing environments; cryogenic service; high-temperature creep/oxidation; sour service per NACE; high cleanliness for semiconductor/biopharma.
2) Standards System (Global + China; include general requirements)
General requirements (must be paired correctly with product standards):
• ASTM A999/A999M — General requirements for alloy/stainless steel pipe (e.g., ASTM A312, A790).
• ASTM A1016/A1016M — General requirements for ferritic and austenitic alloy steel tubes (e.g., ASTM A213, A269, A511, A632).
• ASTM A450/A450M — General requirements for carbon and alloy steel tubes (used by some tube standards; include when project-specified).
Key ASTM/ASME product standards (seamless unless noted):
• Pressure pipe: ASTM A312/ASME SA-312 (austenitic stainless steel pipe).
• High-temperature pipe: ASTM A376/SA-376 (austenitic stainless steel pipe for high-temperature service).
• Boiler & heat-exchanger tube: ASTM A213/SA-213 (ferritic and austenitic alloy steel tubes).
• General small-diameter tube: ASTM A269 (austenitic stainless steel tubing; seamless and welded).
• Mechanical/structural tube: ASTM A511 (seamless stainless mechanical tubing); ASTM A632 (small-diameter austenitic stainless tubing).
• Duplex & super duplex pipe: ASTM A790/SA-790 (seamless and welded duplex stainless steel pipe).
• Duplex & super duplex tube: ASTM A789/SA-789 (seamless and welded duplex stainless steel tubing).
• Welded reference (for completeness): ASTM A312 also covers welded pipe; ASTM A928 (duplex welded), ASTM A358 (austenitic EFW large-diameter) — cited for interface consistency in mixed systems.
EN/ISO standards:
• EN 10216-5 — Seamless stainless steel tubes for pressure purposes.
• EN ISO 1127 / ISO 1127 — Stainless steel tubes — dimensions and tolerances (D-classes and T-classes).
• EN 10297-2 — Seamless mechanical tubes of stainless steels (where mechanical application is specified).
China GB/T standards (stainless):
• GB/T 13296 — Seamless stainless steel tubes for boilers and heat exchangers.
• GB/T 14976 — Seamless stainless steel pipes for fluid transport.
• GB/T 14975 — Seamless stainless steel tubes for structural purposes.
• GB/T 12771 — Welded stainless steel pipes for fluid transport (listed for interface only if mixed with welded lines).
Ancillary examination standards (typical):
• UT: ASTM E213; ET: ASTM E309/E426; PT/MT/RT per project; grain size ASTM E112 (when required).
Dimensions reference:
• ASME B36.19M (stainless pipe); ASME B36.10M (carbon steel — for mixed systems only).
Compliance for special services:
• NACE MR0175/ISO 15156 (sour upstream) or NACE MR0103/ISO 17945 (refining/chemical).
• ASME Section III projects (nuclear) — project-specific addenda govern.
3) Materials System (Grades and families)
Austenitic (typical): 304/304L, 316/316L, 321, 347/H, 310S, 904L, 6Mo (UNS S31254), 316H/304H for high-temp code service where specified.
Ferritic: 409L, 444 (use case driven; chloride caution).
Martensitic: 410/410S, 420 — limited corrosion scope.
Duplex / Super Duplex: 2205 (UNS S32205/S31803), 2507 (UNS S32750/S32760) — for chloride/seawater and high-strength needs.
High-purity austenitic for semiconductor/biopharma: 316L with controlled S, low delta-ferrite, BA/EP finish.
Notes:
• Duplex/super duplex supply shall control ferrite phase balance (typical 35–60% unless project-specified), corrosion testing per ASTM A923 and G48 where required.
• For sour service, hardness windows and metallurgical conditions per NACE; weld procedures qualified to meet hardness limits.
4) Manufacturing and Heat Treatment
• Routes: Billet heating → piercing → hot rolling (mandrel/plug/Assel) or hot extrusion → sizing → solution anneal → straightening → (optional) cold drawing/pilgering → final heat treatment (SA/BA) → finishing.
• Heat treatment:
• Austenitic: solution anneal typically ≥ 1,040 °C followed by rapid quench; BA for high-purity.
• Duplex: solution anneal within grade-specific window; avoid sigma/chi precipitation.
• Stabilized grades (321/347): maintain stabilization intent; grain size control if code-required.
• Cleanliness and prevention: Dedicated stainless handling (no carbon steel contamination), pickling and passivation per ASTM A380/A967.
5) Dimensions, Wall Thickness, and Tolerances
• Outside diameter (OD): About 6–610 mm for pipe series; small-diameter tubing per A269/A213 may be down to ~3–5 mm OD (project-specific).
• Wall thickness (WT): From ~0.5 mm (thin tubing) to 60 mm (heavy wall) depending on standard and mill capability.
• Lengths: Single random (SRL) ~5–7 m; double random (DRL) ~10–13 m; fixed lengths on request.
• Dimensional series: ASME B36.19M (stainless schedule series) or ISO/EN metric series; bore match to line Schedule is mandatory.
• Tolerances:
• Per ASTM A999 (pipe) or ASTM A1016 (tubes) as applicable.
• ISO/EN 1127 D- and T-classes when ISO/EN basis is specified (e.g., D2/D3 for OD, T2/T3/T4 for WT).
• Eccentricity/ovality limits to be stated for heavy-wall and critical services.
• Straightness as agreed (tighten for automatic welding or high-purity hook-ups).
6) Surface and Cleanliness
• Delivery conditions: Hot-finished (HFS), cold-finished (CFS), solution-annealed (SA), bright-annealed (BA).
• Surface finish: Pickled and passivated as standard for process piping; BA or electropolished (EP) for high-purity systems.
• Contamination control: No iron contamination; dedicated tools and slings; oil-free and particulate-controlled for UPW/biopharma; chloride-free cleaning agents for stainless.
7) Quality Control and Examination
• Certificates: EN 10204 Type 3.1 or 3.2; full heat traceability.
• Chemistry: OES/ICP per grade; control of S, P, N, micro-alloying per application (e.g., low-S 316L for BPE).
• Mechanical tests: Tensile, hardness; impact (CVN) if specified (e.g., cryogenic projects).
• Corrosion tests:
• Austenitic: ASTM A262 IGC (practice E commonly specified where applicable).
• Duplex: ASTM A923 (A/B/C), ASTM G48 pitting/crevice (method A/C; temperature as specified).
• NDE (per project and standard):
• UT per ASTM E213; ET per ASTM E309/E426; PT/MT where required; RT for welds if any (for mixed welded scope).
• Hydrostatic test or NDE substitution per ASTM A999/A1016 and the product standard.
• Dimensional examination: OD/WT/length, ovality, eccentricity, straightness; end finish and bevel conformity.
• High-purity: Surface roughness records (ID), residuals (hydrocarbon/particles); double-bag clean packaging for cleanroom.
8) Service–Material–Standard–Size Mapping (Text quick picks)
1. Boiler/heat-exchanger tubes (medium to high temperature)
• Standards: ASTM A213 (paired with A1016); EN 10216-5 for EN projects.
• Materials: 304/304H/316/316H/321/347; duplex where chloride load demands.
• Typical sizes: OD 12–89 mm, WT 1.5–12.5 mm (project-specific).
2. General process and utility piping (ambient to moderately high temperature)
• Standards: ASTM A312 (paired with A999); EN 10216-5; ISO 1127 tolerances if specified.
• Materials: 304L/316L, 321/347 where thermal cycles exist.
• Typical sizes: OD 21.3–610 mm, schedules per ASME B36.19M.
3. Instrumentation and small-bore lines
• Standards: ASTM A269 (paired with A1016) or A632 (small diameter); EN 10216-5 with ISO 1127 T-classes.
• Materials: 304L/316L, BA for clean services.
• Typical sizes: OD 3–25.4 mm, thin to medium WT.
4. Chloride/seawater exposure, offshore/onshore desalination and cooling water
• Standards: ASTM A790 pipe / A789 tube (paired with A999/A1016), EN 10216-5 duplex grades.
• Materials: 2205 (S32205/S31803), 2507 (S32750/S32760).
• Typical sizes: OD 21.3–508 mm; WT per pressure; ferrite control required.
5. Sour service (wet H₂S)
• Standards: As in service class above (A312/A790/A213/A269), with NACE MR0175/ISO 15156 or MR0103/ISO 17945 compliance.
• Materials: 316L with controls; duplex 2205/2507 preferred; hardness windows enforced.
6. High-purity water, biopharma, semiconductor
• Standards: ASTM A269/A632 with BA/EP and cleanliness protocols; ASME BPE for fittings; ISO 1127 tight tolerances.
• Materials: 316L low-S; delta-ferrite control where applicable.
• Typical sizes: OD 6–76.2 mm; BA/EP surfaces with roughness targets.
7. High-temperature service (reheat/oxidation)
• Standards: ASTM A376 (paired with A999) or A312 with H-grades per code; A213 for tubes.
• Materials: 304H/316H/321/347/310S; grain size control if required.
• Sizes: As design; verify creep rupture data by code.
9) Ordering Essentials (copy-ready checklist)
1. Product standard + edition (e.g., ASTM A312-2024 with ASTM A999; ASTM A213-2024 with ASTM A1016; ASTM A789/A790-2024; EN 10216-5 + ISO 1127 tolerance class).
2. Material grade and condition (e.g., TP316L SA; S32205 SA; 316L BA for high-purity; 304H for high-temperature; duplex ferrite range if applicable).
3. Dimensions: OD × WT × length; schedule (ASME B36.19M) or metric WT; tolerance basis (A999/A1016 or ISO 1127 D/T class); eccentricity/ovality limits if tightened.
4. Ends: Plain/beveled per ASME B16.25; end caps; cleanliness class for high-purity.
5. Heat treatment: SA/BA; duplex solution anneal confirmation; H-grade grain size if required.
6. Examinations and tests: Hydro vs NDE substitution; UT/ET coverage; IGC (A262), A923/G48 for duplex; CVN if required; PMI points.
7. Compliance: NACE MR0175/MR0103 (if sour); PED/AD 2000 declaration (if applicable).
8. Documentation: EN 10204 3.1/3.2, heat treatment records, NDE reports, cleanliness/roughness (if BA/EP), third-party witnessing scope.
9. Packaging: End caps, PE sleeves, VCI where needed, clean double-bag for BA/EP; seaworthy crates; no carbon steel contact.
10) Common Risk Checklist (Do/Don’t)
1. Wrong general requirements: Using A450 where A1016 or A999 applies; pair the correct general requirement with each product standard.
2. Omitting duplex controls: No A923/G48 or ferrite range → pitting/SCC or brittleness risk.
3. Chloride service with 304/316 by default: For seawater/bleach/oxidizers, move to 2205/2507 or high-alloy austenitic; verify gasket/bolting compatibility.
4. Heavy-wall eccentricity unchecked: Specify eccentricity/ovality for thick sections to protect stress and weld fit-up.
5. Ignoring NACE hardness windows: Sour lines require verified hardness on base metal and HAZ.
6. High-purity without BA/EP and cleanliness: Specify BA/EP, particle/hydrocarbon limits, and clean packaging.
7. Schedule mismatch at flanges: Bore must match pipe schedule to avoid steps/erosion.
8. Uncontrolled grain size for H-grades: For code high-temp service, lock grain size/class if required.
9. Mixed standard editions: Always state the year/edition to lock P-T ratings and acceptance criteria.
11) Representative Spec Lines (copy-paste)
• Process piping — austenitic
“Pipe, ASTM A312 TP316L, seamless, ASME B36.19M Sch40S, OD 168.3 mm × WT 7.11 mm × L 6 m, condition SA, ends BE per ASME B16.25, tests per ASTM A999 (UT/ET in lieu of hydro as allowed), pickled & passivated, CMTR EN 10204 3.1.”
• Boiler/heat-exchanger tubes
“Tube, ASTM A213 TP304H, OD 25.4 mm × WT 2.77 mm × L 12 m, hot-finished then SA, general per ASTM A1016, straightness per project, hydro per A1016, CMTR 3.1.”
• Instrumentation/clean service (BA)
“Tube, ASTM A269 TP316L, BA, OD 12.7 mm × WT 1.24 mm × L 6 m, tolerances per A1016 and ISO 1127 D3/T3, ET 100%, oil-free cleaned and double-bagged, CMTR 3.1 + surface/cleanliness report.”
• Seawater/desalination — duplex
“Pipe, ASTM A790 UNS S32205 (2205), seamless, ASME B36.19M Sch80S, OD 114.3 mm × WT 8.56 mm × L 6 m, SA, ferrite 35–60%, tests per ASTM A999 + A923 (A/B/C) and G48A @ 25 °C, NACE MR0175 compliant as applicable, CMTR 3.1.”
• High-temperature reheat
“Pipe, ASTM A376 TP321H, seamless, OD 219.1 mm × WT 12.7 mm × L 6 m, SA, grain size per project, NDE per A999, CMTR 3.1.”
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