Industries · Water and wastewater
Water industry fasteners that resist corrosion
HAGUE FASTENERS makes water industry fasteners in the UK for treatment works, desalination, sludge treatment and water reuse plant, in duplex, super duplex, stainless steels, bronzes and nickel alloys.
S32760
Super duplex, plus S32750 and S31803
254SMO
6Mo austenitic for chloride service
Export
A growing share of our overseas sales
3.1 / 3.2
EN 10204 certificates
Wet, chlorinated and often submerged
Where ordinary stainless can let you down
Water industry fasteners live in some of the most corrosive conditions in any plant: chlorinated water, chloride-rich brine, sewage and sludge. This is one industry where we have seen significant growth in our export sales, making bolting for desalination plants, water treatment and sludge treatment plants and water reuse companies overseas.
Standard 304 and 316 stainless steels can pit and crevice corrode in chlorides, especially in warm or stagnant water. Duplex, super duplex and 6Mo grades such as 254SMO resist that attack far better, which is why they are specified for desalination and the harshest treatment duties. In the UK we have worked with many established water treatment companies and their subcontractors.
Where our fasteners go
- Water treatment plants
- Water utility companies
- Sludge treatment plants
- Desalination and reverse osmosis plants
- Water reuse installations
- Filtration equipment manufacturers
- Pump manufacturers
- Purification systems
Materials
Grades for water and wastewater
Typical groups only. Tell us the water chemistry, temperature and specification and we will help confirm the grade.
| Group | Grades we machine |
|---|---|
| Duplex and super duplex | Duplex UNS S31803 (F51), UNS S32550 (Ferralium 255), super duplex UNS S32760 (F55), UNS S32750 (F53) |
| 6Mo and high alloy austenitic | UNS S31254 (254SMO/6Mo), 904L (Uranus B6), Carpenter 20 (CB20) |
| Nickel alloys | Hastelloy C4, C22 and C276, Monel 400 and K500, Inconel 600, 601, 625, 718 and 825, Incoloy 800H/HT and 925 |
| Copper alloys and aluminium | Copper, naval brass, brass CZ121, silicon bronze UNS C65500, phosphor bronze, aluminium bronze CA104, NES 833 and C63000, aluminium |
| Stainless steels | 300 series stainless, including 316 and 316L |
Products
Water industry fasteners we make
Engineer studs
Engineer studs and allthread studding.
Waisted studbolts
For pumps and pressure joints.
Hex and bi-hex bolts
Hexagon and 12-point bolts and nuts.
Socket capscrews
Socket and low head capscrews, slotted countersunks.
Locking nuts
Nyloc, Quadlock and Trilock all-metal locknuts.
Washers
Plain and machined washers to match.
Proving the grade
The duplex you ordered, verified
In corrosive service a mixed-up grade can fail in months. Every bar comes from an approved UK, EU or US mill with its certificate, heat numbers are carried through to release, and PMI and chemical analysis can confirm the grade on finished parts.
- PMI and chemical analysis
- Mill certificates and heat traceability
- Pozi pan head and Torx drive fasteners to drawing
- EN 10204 3.1 and 3.2 certificates
Questions
Frequently asked questions
Which materials are best for water industry fasteners?
For chlorinated water, brine and wastewater, duplex, super duplex and 254SMO resist pitting far better than 304 or 316 stainless. Nickel alloys and bronzes suit particular duties. The water chemistry decides.
Is 316 stainless good enough for water treatment bolts?
Often, in clean water at ambient temperature. In high chloride, warm or stagnant conditions it can pit and crevice corrode, so duplex or super duplex is the safer choice.
Do you supply fasteners for desalination plants?
Yes. Desalination is one of our growing export markets, mostly in duplex and super duplex grades.
Can you verify that fasteners are genuine super duplex?
Yes. PMI and chemical analysis can be carried out on finished parts and reported with the certificates.
Water project?
Send us the duty and the drawing
Tell us the water chemistry, grade, sizes and quantity and we will quote quickly.