Welded valves with built-in straight pipe sections
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This post was last edited by jacques0920 on 2015-12-17 at 14:51. Have anyone ever purchased or seen welding valves (ball valves and check valves) that come with a straight pipe section? I heard it’s to avoid damaging the internal components due to direct welding of the valve body, but isn’t the built-in straight pipe section welded on as well? Thank you.
The manufacturer performs the welding, ensuring that the temperature is well controlled; after installation, a leak test is carried out, and any valves that show leaks are repaired. My “most” crazy short tube with the most valves – Powered by Discuz! http://bbs.hcbbs.com/thread-1513556-1-2.html
In fact, the manufacturer increases the length of the connecting pipe and then processes the valve body; in this way, the welding joint is not affected by welding deformation. Additionally, this length also needs to be taken into account when considering heat treatment for the weld joint
Is the takeover integrated with the valve body? Is heat treatment done before leaving the factory?
Yes, the design team sets out the relevant requirements; it can be installed on-site after procurement.
These small-diameter forged steel valves should be produced regularly, right? Actually, there’s no need for it. The workers on site have such excellent welding skills
But if it’s missed, whose responsibility is it? Does it fail quality checks at the manufacturer’s facility? Was there any damage during transportation? Did on-site welding damage the sealing material? Anyway, in the end the manufacturer still has to come to the site for technical support or send the materials again, which is very troublesome.
Without a straight pipe. If there is a leak, manufacturers are usually sought out on-site. To be honest, anyway. Whenever any problems arise, the user unit usually turns to the manufacturer for a solution. However, this situation rarely occurs. Scratches from transportation. It’s basically impossible.
After all, manufacturers are relatively more professional! Once a leak occurs, the cost is one issue, but it also affects the project timeline.
Once the finishing machining is complete, the pipes are welded together. At that point, any leakage at the valve seats will require disassembly and repair, which represents a serious problem