The groove pipe fittings are gradually popularized in various types of building installation by using the groove pipe joint connection method, and its fast and reliable characteristics have been recognized by the installation industry colleagues, and the groove pipe fittings are also widely used in the construction of fire protection projects. However, different connection methods of rigid clamp, flexible clamp connection should pay attention to what problems, in the existing design, construction standards are not introduced much, China's existing product standards have been published in the clamp industry standards of many provisions, but also related to manufacturing standards, then, together with the following to understand the problems that should be paid attention to when installing trench pipe fittings!

Whether malleable steel can do a good job of anti-corrosion work will have a crucial role for the project, which will not only affect the quality of the entire project, but also affect the progress of the project. Under normal circumstances, if the malleable steel parts can pay attention to anti-corrosion, the service life can reach 50 years, then how should the malleable steel parts do anti-corrosion measures?

Standard basis and content of A106B American standard seamless pipe acceptance
First, the basis for acceptance
The basis for the acceptance of the A106B American standard seamless pipe is mainly the contract signed by the supplier and the buyer (that is, the agreement with legal functions). Therefore, the acceptance work is carried out according to the following documents:

Fatigue: A phenomenon in which a metal material is below the ultimate strength and is subjected to an alternating load (that is, a load whose shape and direction are repeatedly changed) for a long period of time, and suddenly breaks without significant plastic deformation, and is called fatigue. The fatigue index includes fatigue limit and fatigue strength.

Fatigue limit: The maximum stress that a metal material can withstand after repeated (N) stress cycles without repeated fractures is called the fatigue limit.

Fatigue strength: The maximum stress that a metal material can withstand after repeated (N) fractures under repeated or alternating stress is called fatigue strength. At this time, N is called the fatigue life of the material. Some metal materials have no obvious fatigue limit under repeated or alternating stress, and are usually expressed by fatigue strength.

​Shandong Haoxuan Materials Co., Ltd. was established in March 2010 with a registered capital of 200 million yuan. It covers an area of more than 600 acres and employs more than 1,200 people. The company has passed the international quality control Management system IS09001:2008 standard, energy management system, occupational health and safety management system certification, belongs to the provincial and municipal key export enterprises.