B31.3 Design Flashcards
Compatibility of materials with the service and hazards from instability of contained fluids:
Are not within the scope of ASME B31.3
ASME code is not intended to apply to piping:
That has been placed in service
A fluid service that is nonflammable non-toxic and not damaging to human tissue and it’s gage pressure does not exceed 150 psi in the design temperature from -20° through 366°F is known as category
D
A fluid service in which the potential personal exposure is judged to be significant any which a single exposure to a very small quantity of toxic fluid caused by leakage can produce serious in reversible harm persons on breathing or bodily contact even when prompt restorative measures are taken is known as category
M
The heating of metal to and holding at a suitable temperature and then cooling at a suitable rate for such purposes as reducing hardness improving machinability facilitating cold working producing a Desired microstructure or obtaining desired mechanical physical or other properties is known as
Annealing
What might happen to a piping system that has a gas or vapor in it “ like steam” and it is allowed to cool significantly
The pressure in the piping system may reduce sufficiently to create an internal vacuum
What happens to a piping system that has fluids in it and the fluids are heated with the system blocked
The internal pressure will increase
—— ——– caused by external or internal conditions including changes of flow rate hydraulic shock liquid or solid sludging flashing shall be taken into account in the design of piping
Impact forces
Loads on a piping system that include the weight of the medium transported or the medium used for test and snow loads or ice loads or examples of -______ loads
Live
When the service is erosive if there is crevice corrosion present or if cyclic loadings occur slip on flanges shall
Be double welded
The use of slip on flanges should be ________ where many large temperature cycles or expected particularly if the flanges or not insulated
Avoided
Unless save guarded, flanges is severe cyclic service conditions or limited to
Welding neck flanges
Bolting having not more than __________ ksi specified minimum yield Strength shall not be used for flange joints rated ASME B16.5 class 400 and higher
30
Tapped holes for pressure retaining bolting in metallic piping components shall be of sufficient depth that the thread engagement will be at least __________ Times the nominal thread diameter
7/8
What type of backing rings shall not be used under severe cyclic conditions
Split backing rings
