ASME · EN · JIS · GOST · GB CERTIFIED MANUFACTURING

Precision Steel Pipe Fittings, Engineered to Every Standard on Earth

Butt-weld fittings, forged flanges, industrial valves and steel pipe — carbon, stainless, alloy, iron, copper and plastic systems. EN 10204 3.1 MTC with every shipment. 15-day lead time ex-works.

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SYS.ONLINE · ASME B16.9 / EN 10253 / JIS B2311 / ГОСТ 17375 / GB 12459 · MTC EN 10204 3.1
ASME B16.9 · 90° LR ELBOW · A234 WPB
15+Years of Export
60+Countries Served
3,000Tons / Month Capacity
98.6%On-time Delivery

Product Range

Fittings, flanges, valves & pipe · DN15 – DN1200 · Sch10 – XXS · Class 150 – 2500 · BW / SW / THD / Grooved

Download catalogue — PDF, 18 pages Request the complete edition (with plant photography & full size tables) →

Elbow

Butt-weld 45°/90°/180° LR & SR as mainline; socket-weld & threaded available. ASME B16.9 / B16.11, EN 10253.

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Forged Flange

WN / SO / Blind / Threaded / Lap Joint / SW. ASME B16.5 & B16.47, EN 1092-1, JIS B2220.

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Equal & Reducing Tee

Seamless up to DN600, welded above. ASME B16.9, EN 10253, GOST 17376.

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Cross

Equal & reducing crosses for high-pressure manifold systems. ASME B16.9.

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Reducer

Concentric & eccentric (anti-cavitation on horizontal runs). ASME B16.9, EN 10253.

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Cap & Plug

Ellipsoidal caps & threaded plugs, seamless & forged. ASME B16.9 / B16.11.

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Coupling & Union

Forged 3000/6000LB socket-weld & threaded, ASME B16.11. Unions with conical or flat seat.

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Industrial Valve

Gate, globe, check, ball & butterfly. API 600/602, ASME B16.34. Cast & forged bodies.

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Steel Pipe

Seamless & welded, ASME B36.10M. A106 Gr.B / API 5L / A312 TP316L. Cut-to-size available.

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Full Material Spectrum

One supply chain, from high-pressure industrial steel to municipal and residential systems.

Carbon Steel

Highest export volume — oil & gas, chemical and shipbuilding pressure networks. A234 WPB, A105.

Stainless Steel

304 / 316L for food processing, pharma, semiconductor and fine chemical plants.

Alloy Steel

P11 / P22 / P91 for power plants and boilers — extreme temperature and pressure service.

Malleable & Ductile Iron

Galvanized threaded fittings for water and fire mains; large-bore ductile iron for municipal networks.

Copper & Brass

Potable water, gas and HVAC-R systems for US and EU residential markets.

PVC · PPR · PE · PEX

Drainage, underfloor heating and hot/cold water — strong demand across Middle East, North Africa and Eastern Europe.

International Standards Cross-Reference

Select your market. We manufacture and certify to your national standard — dimensions, tolerances and material grades included.

Product

ProductDimensional StandardTypical Materials
ElbowASME B16.9A234 WPB · A403 WP304L/316L · A234 WP11/22/91
Forged FlangeASME B16.5 / B16.47A105 · A182 F304L/F316L · A350 LF2
Equal & Reducing TeeASME B16.9A234 WPB · A403 WP316L
CrossASME B16.9A234 WPB · A860 WPHY
ReducerASME B16.9A234 WPB · A403
Cap & PlugASME B16.9 / B16.11A234 WPB · A105
Coupling & UnionASME B16.11 (3000/6000LB)A105 · A182 F304/F316
Industrial ValveAPI 600 / API 602 · ASME B16.34WCB · CF8M · A105
Steel PipeASME B36.10M / B36.19MA106 Gr.B · A53 · API 5L · A312 TP316L

Click a rating for approximate cross-system equivalence ↓

🇺🇸 ASME🇪🇺 EN / DIN🇯🇵 JIS🇷🇺 ГОСТ🇨🇳 GB

Approximate mapping for quick reference — exact rating depends on temperature class and facing standard.

Material Grade Equivalents

TypeASME / ASTMEN / DINJISGOSTGB
CS FittingsA234 WPBP235GH (1.0345)STPT370 / PT370Ст2020#
CS ForgingsA105P250GH (1.0460)SF440AСт2525#
SS 304 / 304LA403 WP304L1.4301 / 1.4307SUS304 / 304L08Х18Н1006Cr19Ni10
SS 316LA403 WP316L1.4404SUS316L03Х17Н14М3022Cr17Ni12Mo2
Alloy Cr-MoA234 WP11 / WP22 / WP9113CrMo4-5 / 10CrMo9-10 / X10CrMoVNb9-1STPA23 / STPA2415ХМ / 12Х1МФ15CrMo / 12Cr1MoV

Full chemistry & mechanical comparison sheets available on request.

Connection Types

Each connection maps to a different production process — forging, casting or hot pushing. We run all four.

ConnectionProcess & Trade NotesTypical Applications
Butt Weld (BW)Beveled-end welding, 1/2" – 72". High-pressure industrial grade.Oil & gas, long-distance pipelines
Socket Weld (SW)Forged 3000/6000LB, small bore; pipe inserted and fillet-welded.Power plants, precision chemical lines
Threaded (THD)NPT / BSPT threads, malleable iron or forged brass/steel. Low-pressure civil grade.Plumbing, gas, fire protection
GroovedRolled groove with clamp coupling — fast, weld-free installation.Fire sprinkler & building services

Why Engineers Approve Us

Mill Test Certificate EN 10204 3.1

Full heat traceability from billet to finished fitting. 3.2 with TÜV / BV witness on request.

Third-Party Inspection Welcome

SGS, BV, TÜV, Lloyd's — open workshop policy. Hydrostatic, UT, RT, PMI testing in-house.

15-Day Production Lead Time

Production bases across Shandong, Hebei, Zhejiang and Shanghai. 2,000+ tons of standard sizes on stock.

Dual-Hub Trade Structure

Hong Kong contracting & USD settlement, Shanghai export & documentation. Smooth LC handling.

Quality & Certification Framework

Dimensional standards prove a fitting fits. The framework below proves it survives — high temperature, high pressure, sour gas and open flame. Certificates furnished per project requirement.

ISO 9001 QMS
PED 2014/68/EU
AD 2000 W0
API 5L PSL2
NACE MR0175
NORSOK M-650
API 607 FIRE-SAFE
ISO 15848-1 LOW EMISSION
SIL 2/3 IEC 61508
MSS SP-25 TRACEABILITY
CRN CANADA
ABS·DNV·LR BV · CCS

System & Legal Market Access

ISO 9001 / 14001 / 45001 management systems · EU PED 2014/68/EU with PED 4.3 material maker certification · AD 2000-Merkblatt W0, the German benchmark audited jointly with PED.

Product-Level Excellence Standards

API 5L PSL2 line pipe · NACE MR0175 / ISO 15156 sour service (HIC & SSC tested) · NORSOK M-650 for duplex & super-duplex · API 607 / 6FA / ISO 10497 fire-safe · ISO 15848-1 / API 622 / 641 low fugitive emission · SIL 2/3 per IEC 61508 · MSS SP-25 marking & heat-number traceability · CRN for Canada.

Marine & Offshore Classification

Manufacturer approval and product certificates by ABS · DNV · LR · BV · CCS for shipbuilding and offshore platforms.

Dimensional compliance (e.g. ASME B16.9) only proves fit. A true high-safety supply stacks ISO 9001 + PED 4.3, then adds NACE MR0175, API 607 or NORSOK M-650 as the project demands.

Delivered to Landmark Projects

Our fittings, flanges and valves are installed in power, petrochemical and oil & gas facilities across more than 60 countries.

Power Generation

P91/P22 alloy fittings and forged flanges for boiler and steam-line service in thermal power plants.

Petrochemical & Refining

316L stainless and carbon steel systems for process units, tank farms and effluent lines.

Oil & Gas Gathering

API 5L PSL2 line pipe with NACE MR0175 sour-service fittings for wellhead and gathering stations.

Send Your Inquiry

Attach your drawing or spec sheet — our engineers reply within 12 hours with a certified quotation.

sales@harbourfittings.com
+852 5987 6851 (WhatsApp)
Unit 1603, 367-375 Queen's Road Central, Sheung Wan, Hong Kong