Provisions regarding the thread of threaded flange pipes
Thread Content
The outer diameter here is different from the specified outer diameter of Pipe A earlier. What’s going on?
Take a screenshot of the different files too! Flanges should be standard and of uniform specifications to avoid connection errors.
It’s different from the outer diameter of the pipes in Series A
I haven’t used any domestic ones; is it not allowed to use A-series tubes?
I don’t see such a requirement; the tooth angles are different, and there’s a variation in tooth height, but it’s not significant
60° is the NPT tapered pipe thread, per ASME standards
The threads used on threaded flanges are generally sealing threads, and these sealing threads are of the imperial type; accordingly, the pipes used also have an outer diameter that follows imperial standards.
Thread standard numbers: GB/T7306.1~GB7306.2-2000, GB/T12716-2002
The Series A pipes are British standard, so they don’t match