In cold storage cold system, cooling pipe installation considerations

in the cold storage refrigeration system, generally adopts ammonia as refrigerant, transport refrigerant in the installation, should pay attention to the following contents:

1, ammonia refrigeration pipe, seamless steel pipe should be adopted.

2, before installation shall carefully check the pipe material, can not have defects such as cracks, voids and serious corrosion.

3, should be done before the welding pipe purging, derusting, decontamination, and the inner wall of the cotton cloth to wipe, after cleaning the outer wall of pipe should be timely xu brush anti-rust paint.

4, seamless steel tube by welding, small diameter tube can be used welding, keep clear of in time after welding tube, outer wall joint welding slag, weld crater may not have a bit of meat, slag inclusion, porosity, crack, flash and other serious defects. Pipe diameter changes, should use variable diameter tube.

5, the sealed performance is good at flange connection with concave and convex flange sealing surface, adopting the asbestos board as bedding, bedding surface wipe grease seal.

6, when the equipment is with ammonia valve small takeover, such as threaded connection, appropriate USES thick wall seamless steel tube or round steel car thread processing.

7, pipe during installation, should guarantee the horizontal flat vertical slope regulation, but in the level of the compressor suction exhaust pipe section, condenser to the level of the liquid receiver tube section, regulating station to evaporation section line pipe of liquid level, the level of the liquid ammonia into the pipe section, etc, should have a certain slope during construction.

when installation, shall ensure that in each of the gaseous coolant water on line may not appear the phenomenon of local concave down, because of its curved parts will form the sac, the gaseous refrigerant is blocked, and on the level of the liquid refrigerant piping, may not appear to have local convex parts up. Such as between the condenser and evaporator pipes, such as local curved upward section, is easy to form at the airbag, stored up in the air of fluid tube, the liquid is not easy to pass.

8, pipe elbow adopts soups as far as possible elbow, bend radius and = 2. 5 ~ 4 d。

9, pipe wall or floor, should be added a steel casing, the space between the casing and the pipe should be enough.

10, pipes in the bracket, should add asphalt immersion boiled wooden block, the thickness of the mat wood is the same as the thickness of insulating layer.

11, when the small refrigerator using copper pipe, seamless steel tubes should be adopted.

12, in the assembly, branch pipe and the Angle between the director should be greater than 90 °.

13, in the cooling pipe, when the low pressure pipe straight pipe through the 100 m, high pressure pipe straight pipe 50 m, should be set compensator, more commonly used square compensator, can undertake pre-stretching don't have to.

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