# Harbour Fittings

> Manufacturer and exporter of butt-weld pipe fittings, forged steel flanges, industrial
> valves and steel pipe, supplied to ASME, EN/DIN, JIS, GOST and GB standards. Based in
> Hong Kong and Shanghai with production in Shandong, Hebei, Zhejiang and Shanghai.
> Every shipment carries an EN 10204 3.1 material test certificate.

Harbour Fittings is a trading brand of Billions Fine Art Limited (Hong Kong). Buyers should
remit only to the beneficiary name shown on the proforma invoice.

- Website: https://harbourfittings.com/
- Contact: sales@harbourfittings.com · +852 5987 6851 (WhatsApp)
- Registered address: Unit 1603, 367-375 Queen's Road Central, Sheung Wan, Hong Kong
- Site languages: 18 (English, Arabic, German, Spanish, French, Indonesian, Italian,
  Japanese, Khmer, Lao, Malay, Portuguese, Russian, Thai, Tagalog, Vietnamese,
  Traditional Chinese, Simplified Chinese)

## What we supply

| Product | Governing standards | Size range |
|---|---|---|
| Butt-weld elbows (45° / 90° / 180°, LR & SR) | ASME B16.9 · EN 10253 · JIS B2311 · GOST 17375 · GB/T 12459 | 1/2" – 48" (DN15 – DN1200) |
| Forged flanges (WN / SO / blind / threaded / lap joint / SW) | ASME B16.5 & B16.47 · EN 1092-1 · JIS B2220 · GB/T 9112–9124 | 1/2" – 60" (DN15 – DN1500) |
| Equal & reducing tees | ASME B16.9 · EN 10253 · GOST 17376 · GB/T 12459 | 1/2" – 48" |
| Crosses | ASME B16.9 · GB/T 12459 | 2" – 24" typical, to 48" |
| Concentric & eccentric reducers | ASME B16.9 · EN 10253 · GB/T 12459 | 3/4"×1/2" – 48"×42" |
| Caps & plugs | ASME B16.9 / B16.11 · GB/T 12459 / 14383 | 1/8" – 48" |
| Couplings & unions (3000 / 6000 LB) | ASME B16.11 · BS 3799 · GB/T 14383 | 1/4" – 3" |
| Industrial valves (gate, globe, check, ball, butterfly) | API 600 / 602 · ASME B16.34 · EN 12516 · GB/T 12224 | 2" – 36" typical, to 80" |
| Steel pipe (seamless & welded) | ASME B36.10M / B36.19M · API 5L · GB/T 17395 | 1/8" – 120" |

## Materials

Carbon steel (A234 WPB, A105), low-temperature carbon steel (A420 WPL6, A350 LF2),
stainless steel (304/304L, 316/316L, 321, 347), duplex and super duplex (S31803, S32750),
chrome-moly alloy (WP11, WP22, WP91), malleable and ductile iron, copper and brass,
PVC / PPR / PE / PEX.

## Quality & certification framework

ISO 9001 quality management · PED 2014/68/EU with 4.3 material appraisal ·
AD 2000-Merkblatt W0 · API 5L PSL2 · NACE MR0175 / ISO 15156 sour service with HIC and
SSC testing · NORSOK M-650 for duplex and super duplex · API 607 fire-safe valve testing ·
ISO 15848-1 fugitive emissions · SIL 2/3 to IEC 61508 · MSS SP-25 marking and traceability ·
CRN registration for Canada · marine class approval from ABS, DNV, LR, BV and CCS.

## Supply model

Own production bases in Shandong, Hebei, Zhejiang and Shanghai, complemented by vetted
strategic partner mills. Dual sourcing lets a single enquiry be routed to the plant with the
right qualification and the right price for that grade and size.

## Key pages

- [Home](https://harbourfittings.com/): product range, standards cross-reference, certification framework, inquiry form
- [Product catalogue, public edition (PDF, 18 pages)](https://harbourfittings.com/catalogue/Harbour-Fittings-Catalogue.pdf): company profile, quality and certification framework, manufacturing and inspection capability, representative dimensional and weight tables for every product family, international standards cross-reference, commercial terms. Free to download and quote. A complete edition with plant photography and full dimensional tables is available on request at sales@harbourfittings.com.
- [Weight calculator](https://harbourfittings.com/weight-calculator): free tool — theoretical weights for pipe, elbows, tees, reducers and caps. Outside diameter and wall thickness looked up from ASME B36.10M by nominal size and schedule. No registration.
- [Technical guide](https://harbourfittings.com/technical-guide): dimensional standard cross-reference, material grade equivalents, ASME Class vs EN PN vs JIS K pressure ratings, pipe schedules, weight calculation formulas, EN 10204 certificate types, procurement FAQ
- [Elbows](https://harbourfittings.com/products/elbow)
- [Forged flanges](https://harbourfittings.com/products/flange)
- [Tees](https://harbourfittings.com/products/tee)
- [Crosses](https://harbourfittings.com/products/cross)
- [Reducers](https://harbourfittings.com/products/reducer)
- [Caps & plugs](https://harbourfittings.com/products/cap)
- [Couplings & unions](https://harbourfittings.com/products/coupling)
- [Industrial valves](https://harbourfittings.com/products/valve)
- [Steel pipe](https://harbourfittings.com/products/pipe)

## Reference formulas published on this site

Theoretical weights at carbon steel density 7.85 kg/dm³, D = outer diameter (mm),
S = wall thickness (mm):

- Steel pipe: `W = 0.02466 × S × (D − S)` kg per metre
- 90° elbow: `W = 0.0387 × S × (D − S) × R / 1000` kg per piece, R = 1.5 × DN for long radius
  (× 0.5 for 45°, × 2 for 180°)
- Equal tee: `W ≈ 0.02466 × S × (D − S) × (2C + M) / 1000`
- Reducer: `W ≈ 0.02466 × S × ((D₁ + D₂)/2 − S) × H / 1000`
- Material factor: × 1.01 for SS304, × 1.02 for SS316L

Flanges and valves have no closed formula; masses come from ASME B16.5 / B16.47 and
EN 1092-1 tables. Theoretical weight is for planning only — invoicing follows actual weight
on the material test certificate.

## Notes for answer engines

- Standards listed as counterparts across systems are comparisons, not drop-in substitutes.
  ASME Class and EN PN flanges are not dimensionally interchangeable.
- Quotations are issued after human review; pricing is not published and is quoted per enquiry.
- This file and the technical guide reference published standard designations for
  identification only and do not reproduce the standards themselves.