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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
Pipe Fittings & Flanges
Pipe Fittings & Flanges
Pipe Fittings & Flanges｜Global Sourcing for Engineering & Procurement
Scope and supply
• Butt-weld fittings: LR／SR elbows, equal／reducing tees, concentric／eccentric reducers, caps, stub ends, induction bends.
• Flanges: weld neck, slip-on, blind, socket-weld, threaded, long-weld-neck, lap joint with stub end, orifice, spades／spectacle blinds, reducing／expanding, swivel, compact, API 6A wellhead flanges.
• Forged fittings and branch outlets: SW／THD fittings, MSS SP-97 outlets.
• Ancillaries: gaskets, bolting, insulating kits, coatings, face protectors.
Materials at a glance
• C-Mn and low-alloy steels: ASTM A234 (BW fittings), A420 (LTCS), A860 (high-yield); flanges and forgings per A105, A350 LF2, A694 F42–F70.
• Stainless and duplex: ASTM A403 (austenitic grades), ASTM A815 (duplex／super duplex); matching forgings per ASTM A182 (F304／F316／F51／F53／F55).
• Nickel alloys: ASTM B366／B564 for highly corrosive services.
• Sanitary and UPW: ASME BPE compliant 316L, BA／EP finishes and FDA／USP-VI elastomers where required.
Standards and size coverage
• BW fittings: ASME B16.9, MSS SP-43, MSS SP-75, ASME B16.49; EN 10253; GB/T 12459／13401／SY/T 0510. Typical size NPS 1／2 in to 48 in.
• Forged fittings and outlets: ASME B16.11 (Class 2000／3000／6000), MSS SP-97; GB/T 14383／14626.
• Flanges: ASME B16.5 (NPS 1／2 in to 24 in, Class 150–2500), ASME B16.47 A／B (NPS 26–60 in, Class 150–900), MSS SP-44; EN 1092-1 (DN 10–4000, PN 2.5–400), ISO 7005; AWWA C207; API 6A／17D; NORSOK／ISO 27509; GB／T 9112／9113, HG／T 20592／20593, JB／T 4700, GB／T 17241.6.
• Facings and sealing: RF, FF, RTJ, T＆G, M＆F, LJ; select gasket per facing and service; match flange bore to pipe schedule; specify editions to lock P-T ratings.
Quick mapping by sector
• Waterworks and municipal: AWWA C207 flanges with cement-mortar or potable-water epoxy; buried lines with CP; 304L／316L for clean water.
• Seawater and high chlorides: duplex 2205／2507 with EN 1092 or ASME flanges; 316＋graphite or PTFE gaskets.
• Refining and chemicals: WPB／WPL6 and A105／LF2 for utilities; NACE MR0175／MR0103 and hardness control in sour; nickel alloys or PTFE-lined CS for strong acids.
• Power and high-T steam: WP11／22／91／92 with F11／F22／F91; strict PWHT／hardness windows.
• Cryogenic: WPL6／LF2 with CVN, or 304L／316L.
• Sanitary and UPW: ASME BPE 316L, BA／EP, Ra limits, compliant gaskets.
QA／documentation and delivery
• CMTR per EN 10204 3.1／3.2 with chemistry, mechanicals, heat-treatment, NDE.
• PMI and NDE per standards; hydro／air／He-leak as specified.
• Coating QC for blasted surface, DFT and holiday test; markings per MSS SP-25.
• Face protectors and end caps, oiling／shop primer, crated or palletized export packing.
Copy-ready RFQ checklist
• Standard and type；size and rating；material and condition；facing and finish；end type／threads；exams and certificates；surface and packing；industry add-ons（offshore／waterworks／sanitary／nuclear or hydrogen）.
Our value to buyers
• One-stop, multi-standard supply with cross-system fit checks；global sourcing with short lead times；engineering selection support；full dossier and third-party witnessing.
Pipe Fittings & Flanges｜Technical Specifications
1) Scope
Product families
• Butt-weld fittings (wrought): elbows (LR/SR), tees (equal/reducer), reducers (concentric/eccentric), caps, stub ends, induction bends (factory bends).
• Flanges: WN, SO, BL, SW, THD, LWN, LJ (with stub end), orifice flanges, spades & spacers / spectacle blinds, reducing/expanding, swivel/rotating, compact (NORSOK/ISO 27509), API 6A wellhead flanges (6B/6BX).
• Forged fittings & branch outlets: ASME B16.11 SW/THD, MSS SP-97 (Weldolet, Sockolet, Threadolet, Latrolet, Elbolet, etc.).
• Ancillaries: gaskets (B16.20/B16.21/EN 1514), bolting (A193/A320/A194; EN 14399/ISO 898), insulating gasket kits, flange protectors.
Industries / service
Oil & gas (up/mid/downstream, offshore/subsea), refining & chemicals, power (nuclear/thermal/hydro/CSP/storage), waterworks & municipal, mining & metals, pharma & food (sanitary), marine & shipbuilding, semiconductor/UPW, HVAC & firewater.
2) Standards & Codes (Global + China)
Rule: Project-specific specifications govern. When interfacing across systems (ASME Class, EN PN, AWWA), define conversion, fit, and strength explicitly.
2.1 Butt-weld fittings
• ASME/MSS: ASME B16.9 (wrought BW fittings), MSS SP-43 (light-wall stainless), MSS SP-75 (high-strength pipeline fittings), ASME B16.49 (induction bends).
• EN/ISO: EN 10253-1/-2 (C-Mn/low-alloy), EN 10253-3/-4 (austenitic/duplex), ISO 15590-1 (pipeline bends).
• China: GB/T 12459 (steel BW fittings), GB/T 13401 (plate-made BW fittings), SY/T 0510 (OG industry steel BW fittings).
Typical material standards
• C-Mn / alloy: ASTM A234 (WPB/WPC/WP11/WP22/…), ASTM A420 (WPL6/WPL3 LTCS), ASTM A860 (WPHY42–70).
• Stainless / duplex: ASTM A403 (WP304L/316L/321/347H/904L…), ASTM A815 (S31803/S32205/S32750/S32760).
• Nickel alloys: ASTM B366 (Alloy 625/825/C-276/200/201, etc.).
2.2 Forged fittings & branch outlets
• ASME/MSS: B16.11 (SW/THD Class 2000/3000/6000), MSS SP-97 (branch outlets).
• China: GB/T 14383 (SW steel fittings), GB/T 14626 (threaded fittings, legacy usage—confirm per project).
Typical material standards
• Forged C-Mn/LTCS/high-yield: ASTM A105 (normalizing on request), ASTM A350 LF2 (LTCS), ASTM A694 F42–F70.
• Forged stainless/duplex/Ni: ASTM A182 (F304/316/321/347/F51/F53/F55…), ASTM B564 (Ni alloys).
2.3 Flanges
• ASME: B16.5 (NPS 1/2″–24″; Class 150–2500), B16.47 Series A/B (NPS 26″–60″; Class 150–900), MSS SP-44 (pipeline flanges).
• EN/ISO: EN 1092-1 (DN 10–4000; PN 2.5–400), ISO 7005-1/-2/-3.
• AWWA: C207 (large-diameter low-pressure waterworks; Classes B/D/E/F).
• API/Offshore: API 6A wellhead (6B/6BX; 5k–20k psi), API 17D subsea, NORSOK L-005 / ISO 27509 (compact).
• China: GB/T 9112/9113 (steel pipe flanges), HG/T 20592/20593 (chemical flanges/gaskets/fasteners; PN & Class dual series), JB/T 4700 (pressure vessel interfaces; project-dependent), GB/T 17241.6 (ductile-iron flanges).
2.4 Ancillary standards
• Gaskets: ASME B16.20/B16.21; EN 1514; AWWA C207 compatible.
• Bolting: ASTM A193 (B7/B7M/B8/B8M), ASTM A320 (L7/L7M), ASTM A194 (2H/7/8/8M); China cross-refs GB/T 699/3077/1231 (confirm per project).
• Threads: ASME B1.20.1 (NPT), ISO 7-1 (R/Rc BSPT), ISO 228-1 (G BSPP), GB/T 7306/7307.
• Marking: MSS SP-25.
3) Flange Facings & Sealing (detailed)
• RF – Raised Face:
Face height: 1.6 mm (1/16″) for Class 150/300; 6.4 mm (1/4″) for Class ≥600 (per B16.5).
Surface finish: 125–250 AARH (~3.2–6.3 µm Ra).
Gaskets: spiral-wound (316+FG/PTFE), kammprofile, soft PTFE, graphite.
• FF – Flat Face:
For cast iron/non-metallic equipment faces; use full-face gaskets; do not mate RF to FF (risk of edge crushing).
• RTJ – Ring Type Joint:
High-T/P and wellhead/offshore. Profiles R (oval/octagonal) per B16.5; RX/BX per API 6A/compact.
Ring hardness must be lower than flange. Do not mix R with RX/BX.
• T&G / M&F:
Positive gasket location; ideal with linings/glass-lined systems. Faces must be paired; finish as per gasket supplier.
• LJ + Stub End:
Frequent disassembly/alignment issues/corrosion-resistant bore (Stub End CRA, backing flange CS). Stub End types per B16.9 (Type A/B/C).
• Compact Flanges (NORSOK/ISO 27509):
Metal-to-metal cone seal, reduced weight; high bolt preload accuracy; tight machining/assembly tolerances.
Gasket selection tips:
RF → spiral-wound (316+graphite/PTFE), kammprofile; oxidizing/clean services → PTFE/ePTFE; RTJ → RTJ ring only; sanitary → ASME BPE PTFE/EPDM (FDA/USP-VI). For CP/isolation → insulating gasket kits.
4) Materials & Service Mapping
Selection drivers: medium (Cl⁻/H₂S/CO₂/acids/alkalis/oxidizing vs reducing), temperature/pressure, code class (B31.3/B31.1/API/NACE), cryogenic, fatigue/life.
• Utilities (water/inert/low-pressure steam): A234 WPB / A105 (normalized); PN side P245GH/16MnR. Low-temp: A420 WPL6 / A350 LF2 (CVN at −46 °C typical).
• High-T steam / hot reheat: WP11/22/91/92 + F11/F22/F91/F92; strict PWHT and hardness control.
• Chlorides/seawater: A815 S32205/S32750 (Duplex/SDSS) or Ni/Ti; avoid bare CS in seawater unless lined/CP.
• Sour service: Refining/chemical → NACE MR0103/ISO 17945; upstream → MR0175/ISO 15156; typical CS/HAZ ≤22 HRC.
• Strong acids / mixed acids: C-276/C-22/625/825 or PTFE-lined CS; avoid 304/316.
• Cryogenic (LNG/LPG/H₂/LAES): A333 / 304L/316L / Ti; B31.12 for hydrogen; helium leak test as required.
• Sanitary/UPW: ASME BPE 316L (controlled S), EP/BA finish, Ra ≤ 0.5 µm (SF1) / 0.38 µm (SF4); FDA/USP-VI elastomers.
5) Dimensions & Ratings
• ASME B16.9: NPS 1/2″–48″ typical; larger via MSS SP-75 / EN 10253 / project drawings.
• ASME B16.11: THD Class 2000/3000/6000; SW Class 3000/6000; NPS 1/8″–4″.
• ASME B16.5: NPS 1/2″–24″; Class 150/300/400/600/900/1500/2500.
• ASME B16.47 (A/B): NPS 26″–60″; Class 150/300/400/600/900.
• EN 1092-1: DN 10–4000; PN 2.5–400 (Types 01…11).
• AWWA C207: ~4″–144″; Classes B/D/E/F (cold water). Not equivalent to ASME Class.
• API 6A: 6B/6BX; 5k/10k/15k/20k psi.
Bore match: Flange bore must match pipe NPS × Schedule to avoid steps/erosion.
Edition control: Specify standard edition/year to lock pressure-temperature ratings (B16.5/47).
6) Manufacturing & Forging System
• Wrought BW fittings: seamless pipe/plate → hot forming (press/bend/extrude) or plate forming + weld → heat treatment (N / N+T / Q+T / solution) → sizing → end machining → pickling/passivation (ASTM A380/A967) → marking (MSS SP-25).
• Flanges/forged parts: ingot/CC bloom → open-die breakdown → ring rolling / die forging / upset & pierce (directional properties in hub) → forging ratio ≥ 3–4 (project-specific) → N/Q+T/Solution → rough-machining → UT per ASTM A388 → finish-machining faces/RTJ grooves → stamping → preservation.
• Defect control: laps/inclusions/flake (white spots)/flowline breaks; controlled forging temperature, adequate reduction, isothermal forging, de-hydrogenation/tempering, graded UT (S2/E2/E3).
• Heat treatment:
CS/low-alloy → N, Q+T, stress-relief;
Stainless/duplex/Ni → solution anneal rapid quench (≥~1040 °C by grade); duplex: avoid σ/χ precipitation;
Wellhead/high-pressure → Q+T with hardness/toughness windows (API 6A PSL).
7) QA/QC & ITP Backbone
• Chemistry & PMI: OES/ICP; 100% PMI at high-consequence locations (API RP 578 logic).
• Mechanical: YS/UTS/El; CVN at specified temperature for LTCS (WPL6/LF2); hardness limits for sour (e.g., ≤22 HRC typical).
• Metallography / phase control: Austenitic ASTM A262 (IGC); Duplex ASTM A923 (A/B/C) + ferrite content target (e.g., 35–65% unless otherwise specified); ASTM G48 pitting/crevice (Method A/C).
• NDE:
Forgings/flanges → ASTM A388 UT + MT/PT;
BW fittings → per ASTM A960/A960M and product standard (UT/RT/MT/PT; SP-75 mandatory NDE);
B16.49 bends → RT/UT + thinning control.
• Geometry & facings: B16.5/47/9/11 and EN 1092/10253 tolerances, face finish, RTJ groove, bore match.
• Pressure/tightness: Typically rated, not hydrotested; if required, hydro/air; He-leak for hydrogen/nuclear/high-purity.
• Coating QC: blast grade, DFT, adhesion; AMPP (NACE) SP0188 holiday test where applicable.
• Documentation & witnessing: EN 10204 3.1/3.2, HT curves, original NDE, pressure/leak tests, coating QC, NACE compliance, TPI (ABS/LR/DNV/BV/TÜV/SGS) witness points.
8) RFQ / PO Checklist (copy-ready)
1. Standard & type: e.g., ASME B16.9 LR 90° Elbow / ASME B16.5 WN RF / EN 1092-1 Type 11 WN / API 6A 6BX / MSS SP-97 Weldolet / AWWA C207 Class D WN.
2. Size & rating: NPS/DN, Schedule/WT, ASME Class / PN / pressure (psi/MPa).
3. Material & condition: A234 WPB / A420 WPL6 / A860 WPHY65 / A403 WP316L / A815 S32205 / A105 (normalized) / A350 LF2 / A182 F316L / A694 F65 / B564 N06625; NACE MR0175 or MR0103?
4. Facing & finish: RF/FF/RTJ/T&G/M&F; RF 125–250 AARH; RTJ R/RX/BX; compact per NORSOK/ISO 27509.
5. Ends & threads: BW bevel (B16.25) / SW / THD (B1.20.1 NPT); sanitary per ASME BPE/ISO 2852 (Ra/SF).
6. Heat treatment/hardness: N/Q+T/solution; sour hardness limit; duplex ferrite range.
7. Exams: PMI, NDE (UT/RT/MT/PT) coverage, LT CVN, IGC (A262), duplex A923/G48, hydro/air/He-leak as needed.
8. Docs: EN 10204 3.1/3.2, HT curves, NDE reports, pressure/tightness, coating QC, TPI scope.
9. Surface/pack: pickling/passivation / shop primer / FBE / Zn-Al thermal spray; face/RTJ protectors, end caps, VCI, crates.
10. Industry add-ons: Offshore (NORSOK M-501 coating/CP), Waterworks (NSF 61/372 & AWWA flanges), Sanitary (BPE/EP/Ra, FDA/USP-VI), Nuclear/Hydrogen (cleanliness & He-leak).
9) Quick Material Picks by Sector (text)
• Waterworks/utility: WPB + A105 (normalized); buried/coastal → coating + CP.
• Low-temp −46 °C: WPL6/LF2 (CVN) + A320 L7/L7M bolting.
• Seawater/high Cl⁻: S32205/F51 (PN16–PN40/CL300); harsher → S32750/F53 or Ti/Cu-Ni.
• Sour: hardness control + duplex/Ni; post-weld stress-relief as required.
• High-T steam: WP11/22/91/92 + F11/F22/F91; PWHT/hardness.
• Sanitary: ASME BPE 316L, EP, Ra ≤ 0.5 µm, FDA/USP-VI elastomers.
• Wellhead/high-pressure: API 6A 6B/6BX, 4130/8630 Q&T, RTJ BX, PSL-3/4.
• Large water flanges: AWWA C207 D/E + C210/C213/C222 coatings; SP0188 holiday test.
10) Risk Checklist (Do/Don’t)
1. Treating AWWA Class as ASME Class (hole pattern/ratings mismatch).
2. RF-to-FF mating (damages equipment face).
3. Writing “A105N” as a grade (use A105 (normalized)).
4. Claiming B16.9 conformance beyond 48″ (use SP-75/EN 10253/drawings).
5. Selecting 304/316 in high-Cl⁻/strong oxidizers (use Duplex/SDSS/Ni/Ti).
6. No hardness control in sour service (SSC risk).
7. No CVN for LTCS (WPL6/LF2).
8. RTJ profile/hardness mismatches.
9. Bore mismatch → erosion/pressure drop.
10. Duplex ferrite out of range/secondary phase (do A923/G48/δ-ferrite).
11. Offshore life without coating/CP/compact solution.
12. Sanitary: specifying only “316L” without BPE/EP/Ra/gasket compliance.
13. Nuclear/hydrogen/cryogenic without cleanliness/He-leak.
14. Mixing GB with ASME/EN without equivalency & adapter provisions.
11) Representative Spec Lines (copy-paste)
• ASME pipeline flange
Flange, ASME B16.5, WN RF, NPS 12, Class 600, ASTM A694 F65 (Normalized & Tempered), Bore to NPS12 Sch80, Facing 125–250 AARH, UT per ASTM A388, CMTR EN 10204 3.1.
• EN PN seawater duplex
Flange, EN 1092-1 Type 11 (WN RF), DN300 PN40, ASTM A182 F51 (S32205), Pickle & Passivate per ASTM A380/A967, Gasket EN 1514-2, Bolting A193 B7/A194 2H, PMI 100%, G48-A @25 °C Pass, CMTR 3.1.
• High-yield BW tee
Fitting, ASME B16.9, Equal Tee, NPS 24, MSS SP-75 WPHY65, Wall per line Schedule, NDE RT/UT per SP-75, CMTR 3.1.
• B16.11 LTCS SW elbow
Forged SW Elbow 90°, ASME B16.11, 3000#, NPS 1-1/2, ASTM A350 LF2, MT + CVN @ −46 °C, CMTR 3.1.
• API 6A high-pressure
Flange, API 6A 6BX, 10k, RTJ BX ring, 4130 Q&T, NACE MR0175 compliant, PSL-3, Hardness per spec, NDE per API 6A, CMTR 3.2.
• AWWA large waterworks
Flange, AWWA C207 Class D, 84″, CS, Drill per C207, Coating per AWWA C210/C213, Holiday test per AMPP SP0188, CMTR 3.1.
• Sanitary ferrule
Ferrule, ASME BPE, 316L (low-S), SF1 Ra ≤0.5 µm ID, Electropolished, Gasket PTFE (FDA/USP-VI), Surface report + CMTR.
12) GB/HG ↔ ASME/EN Cross-Reference (quick notes)
• GB/T 12459 / 13401 / SY/T 0510 ↔ ASME B16.9 / MSS SP-75 / EN 10253 (ranges differ; confirm per project).
• GB/T 9112/9113 / HG/T 20592/20593 ↔ ASME B16.5/B16.47 / EN 1092-1 (dual PN/Class universe).
• GB/T 17241.6 (DI flanges) ↔ EN 1092-2.
• GB/T 14383/14626 (SW/THD) ↔ ASME B16.11 / ISO 7-1/228-1.
Note: Dimensional series, pressure ratings, and facing codes are not one-to-one. Cross-system joints must be accompanied by fit/strength checks and, where needed, adapters/transition pieces.
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