Product category:
Process and OEM Valves
News Release from: Arc Energy Resources | Subject: Overlay cladding
Edited by the Engineeringtalk Editorial
Team on 16 April 2004
Cladding protects Severn Glocon oilfield
valves
When Gloucester-based Severn Glocon had to quote for two 24in 1500 severe-service valves it turned to Arc Energy Resources to find a cost-effective solution.
Gloucester-based Severn Glocon has over 40 years experience designing and developing standard and highly specialised control valves for customers in the oil and gas, chemical, pharmaceutical, power, and industrial gas industries world-wide Recently the company was given the opportunity to quote and win an order for control valves for a major new oil and gas production platform to be stationed in the Mediterranean Sea
This article was originally published on Engineeringtalk on 9 Apr 2007 at 8.00am (UK)
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Cladding helps fabricator complete contract
When Langfields won a major contract from Shell's Stanlow Refinery, part of the project required overlaying four 36in carbon steel elbows with stainless steel.
The specification called for the valves to be constructed from Incoloy 825 and Inconel 625 materials to give additional protection for the valve bodies, flanges and bonnets against the sour, H2S gas and associated condensate streams produced.
Many of the small valve sizes could be cast in the expensive 825 and 625 materials at a competitive price, but two 24in 1500 severe-service valves required careful consideration to material choice and cost.
For these two valves, Technical and Commercial Sales Manager Allan Homfray turned to weld overlay cladding specialist Arc Energy Resources, which had the expertise to provide a complete service, overlay cladding Inconel 625 onto a lower-cost alloy steel base and fabricating the flanges to the body.
The valves, which were forged from high-strength, low-temperature A350 LF3 steel and weigh almost 18t each when completed, were clad on one of Arc Energy's seven workstations that was specially equipped with a hired rotator to cope with the exceptional size and weight.
Comments Arc Energy sales manager Alan Brown: "Due to critical elements of the design and function of the valve bodies, it was necessary for us to qualify new welding procedures to work on the high-strength materials.
These included designing and producing our own special welding heads for the automated TIG process to enable certain areas of the valve bodies to be welded blind".
He adds that after applying a coating of Inconel 625 to the bodies, flanges and bonnets, Arc Energy welded the flanges to the valve bodies, radiographed all welds and stress relieved the completed work - all in-house.
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