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Why the pressure Class 900 is not mentioned in API 602
I am new from the valve industry ,I understand API 602 is standard for steel GGC valves with small sizes. it specifies the pressure designations of Class 150, Class 300, Class 600, Class 800 and Class 1500? i am wondering why the Class 900 is not mentioned? As ocassionaly, i have been asked to...- CKchi
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- Replies: 1
- Forum: Valve engineering
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Vulcanized liner VS rubber liner on butterfly valves
From my knowledge, the rubber liner is replacable and Vulcanized liner is boned to the body by vulcanization. So in most cases i guess rubber liner is preferred as the liner can be replaced for cost saving. My question is what is the main purpose of having these two designs? Generally in what...- CKchi
- Thread
- Replies: 3
- Forum: Valve engineering
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Replacebale seats or Intergral seats
Recently i faced a case on 3/4 inch forged steel valve (ISO157160 . The client is insisting to have replacebale seat inserts, but our supplied forged globe valve is interal body seats with stellite 6 overlay. Referrign back to ISO15716 Section 5.4.6.1 “Integral body seats are permitted in...- CKchi
- Thread
- Replies: 3
- Forum: Valve engineering
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Valve NDT Test - UT/RT/PT?
Hi, I am new in valve industry, i have a lot confusion on the NDT test (UT/RT/PT). In what situation shall we carry out the correct NDT method? I understand my company that: 1. We dont carry RT on forging valves. 2. We dont carry UT on Casting vavles. Can anyone give your opinions? what are...- CKchi
- Thread
- Replies: 5
- Forum: Valve engineering
