Indication of fastener material on pressure vessel drawings
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As the title suggests, should the material standards and version numbers of the fasteners be indicated on pressure vessel drawings?
For materials, it is necessary to indicate the standard and year number. . . Bolts of M36 and above are also the main compression elements
If it is used for connecting internal components, I think it can be omitted...
The internal components that serve a connecting function can probably be omitted, right? ?
It is generally necessary to indicate this, so as to provide a basis for manufacturing and procurement.
The standard for flange fasteners must be specified; it doesn’t matter inside. However, the materials are necessary; the fasteners for pipe flanges must take strength into account, while those for internal components need to consider corrosion.
The stressed components must definitely be specified; fasteners manufactured under different standards vary from one another, with differences possibly existing in terms of raw materials, processing methods, and heat treatment. As for the non-compressed elements, just specify a material for them.
Yes, generally it’s for the convenience of procurement.
I think it’s necessary; Xiaoming makes a valid point
I want it. Special-grade ones are generally only allowed on pressure vessels