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Pipe's FAQ Guide

Pipe's FAQ Guide


What are the Common Problems With Pipes


access problem


Pipes on the ground should try to avoid crossing with roads, railways and waterways. When crossing cannot be avoided, the crossing height should also enable pedestrians, vehicles and boats to pass safely. Underground pipelines are generally laid along roads, and various pipelines are kept at an appropriate distance for installation and maintenance; the surface of heating pipelines has an insulation layer, which is laid in trenches or protection pipes to avoid being crushed by soil and allowing the pipes to expand move.


support problem


Pipes may be subjected to many kinds of external forces, including their own weight (weight of pipes, valves, pipe joints, insulation and fluid in pipes), the thrust of fluid pressure acting on pipe ends, wind and snow loads, soil pressure, thermal expansion and cooling Thermal stress, vibration load and earthquake disaster caused by shrinkage. In order to ensure the strength and rigidity of the pipeline, various supports (hangers) must be set up, such as movable supports, fixed supports, guide supports and spring supports. The setting of the bracket is determined according to the conditions of the pipe diameter, material, pipe wall thickness and load. The fixed bracket is used to control the thermal elongation of the pipeline in sections, so that the expansion joint can work evenly. The guide bracket allows the tube to move only axially.


Compensation issue


If the pipeline cannot expand and contract freely, it will generate huge additional stress. Therefore, on pipelines with large temperature changes and normal temperature pipelines that require free displacement, expansion joints need to be set to compensate for the expansion and contraction of the pipeline and eliminate the influence of additional stress.


safe question


In order to ensure the safe operation of the pipeline and prevent the expansion of the accident in time, in addition to installing detection and control instruments and safety valves on the pipeline, special safety measures are also taken for some important pipelines, such as gas pipelines and long-distance oil and natural gas transportation. An accident relief valve or emergency shut-off valve is installed on the pipeline. They can automatically stop delivery in a timely manner in the event of a catastrophic accident to reduce disaster losses.



The connection method between pipes, pipe joints, valves and the inlet and outlet pipes on the equipment is determined by the properties, pressure and temperature of the fluid, as well as the material, size and installation place of the pipes. 


zhejiang valtec plumbing equipment Co., Ltd.