consequences: warm who in the engineering construction, take iron structure, even to cut off the reinforced, and the safety of the building performance.

measures: familiar with warm who seriously construction drawings, according to the needs of steam-water pipes and installation, actively cooperate with the building structure construction seriously reserved holes and embedded parts, the rules and regulations of the specific reference to the design requirements and construction.

7: pipe welding, pipe after counterpart hi-lo is not a Central Line, line no space, don't shovel groove, thick wall pipe weld width and height do not conform to the requirements of the construction specifications. Consequences: the pipe hi-lo is not a center line directly affect the welding quality and visual quality. Counterpart no space, don't shovel groove, thick wall pipe weld width, height is not in conformity with the requirements of the welding could not reach the requirements of strength.

measures: after welding pipe line, pipe can't hi-lo, want to be in a center line, line should leave a gap, thick wall tube to shovel groove, and weld width and height of the welding shall be in accordance with the specification requirements.

8: pipeline buried directly in permafrost and no processing scarification, inappropriate position of pipe pier spacing and, even in the form of dry brick yards.

consequences: pipeline due to bearing not solid, suffered damage in the process of backfill soil compaction, rework, repair.

measures: pipe shall not be buried in the frozen soil and no processing scarification, piers spacing to conform to the requirements of the construction specification, bedding to secure, especially the pipe outlet, should not be under shear stress. Brick piers with cement mortar masonry to ensure complete and strong.

9: fixed pipe support of bolts material inferior, expansion bolt size is too large or bolt installation on the brick wall even light wall.

consequences: loose pipe supports, pipe deformation occurs, or even fall off.

measures: expansion bolt must choose qualified products, test inspection sampling shall be carried out when necessary, installation of expansion bolt diameter should not be greater than 2 mm expansion bolt diameter, expansion bolt used in concrete structure.

10: pipe connection flange and gasket strength is not enough, connection bolt diameter short or fine. Heat pipe using rubber mat, cold water pipe using asbestos mat, and USES the double cant pad or cushion, tube flange gasket tu people.

consequences: flange connection is not tight, even damage, appear leakage phenomenon. The flange gasket into tube, can increase the flow resistance.

measures: pipe with flange and gasket must meet the requirements of pipeline design working pressure. Heating and hot water supply pipe flange gasket, appropriate USES rubber asbestos pad; Water supply and drainage pipeline flange gasket, appropriate USES rubber mat. The flange gasket may not into tube, outside the circle to the flange bolt hole is advisable. Shall not be placed among the flange cant pad or a few gasket, flange bolt diameter than the flange diameter should be less than 2 mm, bolt nut length appropriate for 1/2 the thickness of the nut. 11:

taboos piping system when water pressure strength test and leak test, only observe the pressure value and the change of water level, the leakage check is not enough.

consequences: pipeline system leakage phenomenon occurred after operation, affect the normal use.

measures: pipeline system according to the rules and regulations of the design requirements and construction during the test, in addition to record the change of the pressure value or level within the given time, in particular, carefully check whether there is any leakage problem. 12:

taboos wastewater, rain water, condensed water pipe is not do close water test and concealment.

consequences: may cause leaks, and thereby causing loss to the user.

measures: closed water test examination and acceptance of work shall be in accordance with the specification. Buried underground, inside condole top, between the pipe and other dark of wastewater, rain water and condensate pipes to ensure not seepage leakage.

taboo 13: rinse without carefully before completion, pipeline system can not meet the pipeline irrigation demand flow and speed. Even replace the flush with drain water pressure strength test.

consequences: water run short of pipeline system, this also tend to cause pipeline section reduced or blocked.

measures: with a maximum set juice flow in the system or should not be less than 3 m/s rate of water to wash. To discharge water color, transparency, water color, transparency, visual consistent with inlet water is qualified.

14: winter construction in hydrostatic test under negative temperature.

consequences: because the water pressure test tube ice soon, when the pipe freezing.

measures: as far as possible in the winter for hydrostatic test, before and after the test will blow water net, especially if the water inside the valve must be removed in a net, or the Industrial Valves will be frost crack. Engineering should be carried out during the winter months when the water pressure test, should keep indoor temperature is under, to water net after pressure test. During the hydrostatic test can't, can use compressed air to experiment.

keywords: valve Industrial Valves installation taboo comfort measures
Shenzhen Mech Valve Trading Co., Ltd. is devoted to satisfy our customers with a wide array of the finest using experience.
Mech Valve is the vital link in the supply chain, adding value with efficient and cost-effective service and solutions for our customers and our suppliers.
An interesting website that contains directions (and recommends items) for resilient seated gate valve cast iron gate valve is Mech Valve. Find us on Mech Valve, your problem will be fixed.
With wide range of [分类关键词] products of top quality in offer, Shenzhen Mech Valve Trading Co., Ltd. will definitely be your best option for double flanged gate valve solution. Do feel free to contact us at Mech Valve.