Pre-heating: used to control the formation of H2 cracks
Bolted joints used in these cases components can’t be service inline, not capable of being welded, quick field assembly required, frequently remove component for
service or low cost & time save
The primary ASME standards for piping dimensions are:
- ASME B36.10M: For wrought steel pipe.
- ASME B36.19M: For stainless steel pipe.
- ASME B16.5: For flanges and flanged fittings.
- ASME B16.9: For butt-welding fittings.
- ASME B16.11: For forged fittings.
- ASME B16.25: For butt-welding ends.
- ASME B16.34: For valves.
- ASME B1.20.1 Pipe thread dimensions
Valve selection according to (Function, Pressure drop, Work temperature, Closing time, Type of joint, Seat tightness, Type of seat, Type of medium, Materials, Design
& operating condition)
Strainers used to protect equipment sensitive from dirt or other particles carried by fluid
Design pressure safe for short occasional or short operating periods if higher than design pressure if loop pressure less than (Y SA max allowable pressure)
Y = 15% if event less than continuous 8 hrs/day or 800 hr/year
Y = 20% if event less than continuous 1 hrs/day or 80 hr/year
Maximum sustained pressure + occasional pressure + transient pressure less or equal design pressure by code
