Raising Standards for Chlorine Service

Open bellows design after chlorine service

Open bellows design after chlorine service

Bubble tight after 4 years’ service.

Bubble tight after 4 years’ service.


Flowstream — Hunt & Mitton have become only the 5th valve company in the world to have their bellows sealed globe valves designs approved by Euro Chlor. BVAA’s Director Rob Bartlett was delighted to be able to participate in a certificate ceremony at the recent Valve World Expo event, on the BVAA stand.

Worldwide over 60 million tonnes of chlorine are produced. It is a chemical that has become essential for our daily lives. However, it is an extremely hazardous chemical. It must be safely contained inside the pipework system during its manufacture and subsequent use. As part of their commitment to promote the best safety, health and environmental practices Euro Chlor, the organisation representing European chlorine manufactures, have established standards for the valves used in chlorine service, which are recognised as defacto world standards.

The Euro Chlor approval is a performance based approval. Valves must have completed a minimum of 2 years successful field trials with two Euro Chlor member companies before full certification can be achieved. The Flowstream approval covers the Hunt & Mitton Series 8800 & 8801 in sizes 1” to 6”, PN40 and Class 300 pressure temperature ratings.

Euro Chlor’s latest specification GEST 06/318 published in June 2012 challenged the approved manufacturers to improve the quality of their castings. The acceptance criteria was raised from ASTM E446 Level 3 to Level 2. However, manufacturers were still allowed to accept batches of castings using radiographic testing on a sampling basis. The casting process has many variables and inevitably a percentage of those castings not tested have defects exceeding the acceptance criteria. Rather than following the sampling approach Flowstream wanted to be able to give Euro Chlor a 100% guarantee that their castings achieved the Level 2 specification hence their decision to radiograph every casting.

The Hunt and Mitton design has been shown to give exceptional tight shut off performance. Valves that have been in service for four years were consistently found to be still giving bubble tight shut off when removed for examination and testing as part of the approval process. Users have been most impressed with the quality of the disc sealing surface compared with their previous experience of other designs.

The valves are manufactured in China. The Flowstream manufacturing and quality processes were rigorously investigated by Euro Chlor supported by independent audits by LRQA and TÜV.

Flowstream Managing Director Nick Greenall was very enthusiastic about their achievement. “We are extremely proud of this certification. It is an important milestone in our strategy of bringing a better product, at a lower price to the Chlor-alkali industry around the world.”

For more information or if you have any queries regarding this press release, contact Martin Greenhalgh on m.greenhalgh@flowstream.co.uk Open bellows design after chlorine service

Tel: +44(0)161 425 7421
Email: info@flowstream.co.uk
Web: www.flowstream.co.uk


Published: 6th February 2017

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