HVF : Custom Fabrication, Welding and Pipework
Introduction
HVF Valves Ltd offer a custom fabrication service to complement our range of fittings.
This is carried out to the highest possible specifications demanded by the Brewing, Dairy, Food, Pharmaceutical and Biotech Industries.
Fabrication and welding is performed in accordance with BS EN 287 and 288 qualifications and procedures to ASME 9 available for specials. Orbital and Mechanised Welding are also offered, where high levels of consistency and traceability are required.
It is appropriate also, to point out that not all welds can be produced mechanically.
Materials:
The standard material for most of our work is 316 and 316L however, 304L is still used in many breweries throughout the UK, Ireland and mainland Europe.
Range:
The range of work carried out is mostly adaptors where one type of thread needs to be converted to either a different size of fitting or standard such as T-Clamp. This is achieved with fabricated adaptors or machined fittings where we would agree on a sketch or drawing to produce the desired fabrication.
We also produce small process vessels and frames where often the tank wall us either rolled to size or a tube is chosen to match the neck diameter of a manway and standard Domed End.
Examples:
Fabricated reducers and manifolds
Machined adaptors such as Clamp Fittings to BSP or NPT threads
Process and storage vessels
Valve modifications
Surface finish and passivation.
This is an increasingly important area of the custom fabrication and welding service. The demanding requirements of the pharmaceutical and cosmetic industries is driving up the standards in the biotech, food, dairy and fine chemical industries.
Ground and polished finishes can be produced from a rough 2.5mM Ra (80Grit) that is satisfactory for general tubular and frame work; to 0.25mM Ra (500Grit) and electro-polishing, which is used by the cosmetic and pharmaceutical companies for WFI applications.
It is possible to produce even finer finishes such as 0.10mM Ra and better and these are often required by some pharmaceutical applications and are common place in the semi-conductor Industry.
Ra is defined in BS 1134.
- Fabrication: Welding and fabrication procedures carried out to food, pharmaceutical, cosmetic and biotech standards. Welding to BS EN 287 and 288 and ASME 9 for special requirements.
- Surface finish: Surface finishing is carried out to our customers’ requirements and includes mirror polishing, electro-polishing and passivation.
- Materials: A wide range of materials is available, including the standard 316/316L and 304L stainless steels, also Nickel Alloys including Alloy 400, 904L, 254SMO and Alloy C22 and C276.
Certification:
Certificates of conformity are supplied with each invoice to verify the integrity of the products supplied. We can offer BS EN 10204/DIN 50049 3.1 material certificates for many of our products, but it is advisable to notify us of this requirement at the time of enquiry, as it is not always possible to supply these retrospectively.
