1 Application scope
This specification is applicable to the calculation and selection of steam traps (hereinafter referred to as “traps”) in chemical engineering design.
2 Setting of traps
Traps shall be set in the following positions:
2.0.1 The end or lowest point of saturated steam pipe (including the steam pipe for tracing).
2.0.2 In the middle of the long-distance steam pipe; before each compensation bend or the lowest point of the saturated steam pipe; the lower part of the riser.
2.0.3 In front of the pressure reducing valve and control valve on the steam pipe.
2.0.4 The steam pipe’s dead end through which steam does not flow frequently and which is the lowest point, such as in front of the valve of steam pipe in utility material station.
2.0.5 Low points of steam water separator, steam distribution tank or pipe, steam pressure reducer and humidifier as well as the position for water level control of flash drum.
2.0.6 Steam heating equipment; condensed water outlet of jackets and coils.
2.0.7 Equipment and pumps that are often in hot standby state; the lowest points of the steam inlet pipes of the intermittently-operated equipment and pump and the on-site standby equipment and pump.
2.0.8 Other cases requiring drainage.
3 Types and main technical performances of traps
3.0.1 The classification of steam traps according to the action principle is shown in Table 3.0.1.
1 Application scope
2 Setting of traps
3 Types and main technical performances of traps
4 Selection of traps
5 Design requirements of trap system
6 Calculation and selection table and summary list of traps
