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API 6D valve end-to-end length

API 6D valve end-to-end length

API 6D valve end-to-end length

(OP)
Hello everyone,

In tables 2 to 6 of the code the end-to-end dimension for butt-welding valves in different ratings and sizes are indicated,

The question is:

Are this values mandatory?
Does a valve that hace a different end-to-end dimension is off code?

I'll really apretiate your comments,

RE: API 6D valve end-to-end length

The best way to figure out if the values are mandatory is to read the standard. Section 7.4 is titled "Face-to-face and End-to-end Dimensions," so that's probably a good place to look. It says "Unless otherwise agreed," the face-to-face and end-to-end dimensions shall be in accordance with the tables. So if your customer agrees to a different length, then you can make that length and it will still be to code. Note that 7.4 also requires you to mark the face-to-face or end-to-end dimension on the nameplate if it is different from the tables. As well, the current edition is the 24th edition (which was published August 2014); you may be working to an old edition if you are still referring to tables 2 to 6 for end dimensions.

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