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Gasket Regular Maintenance, Enhanced Management
Jun 08, 2017

Flange structural seal reliability depends on the original careful design, but also with the site in the perfect engineering practice. The seal can not function or can not maintain a satisfactory seal, even if a series of leaks or seal failure occurs, especially a series of factors. These factors are summarized in the following four areas: design, assembly, connectors and gasket material. The following is a list of the following:

Design: the reasons for the bolt preload is not enough, the gasket is too thin,

Preventive measures can change the diameter and number of bolts from the price, replace the higher strength of the bolt material, change the thicker gasket.

Assembly: the reasons for the bolt tightening torque is not enough, fastening steps are not correct.

Precautions You can fasten the bolts by attaching fastening torques according to the correct steps.

Sealing surface: the reason is the flange is too thin, two free throws are not parallel and different heart and so on.

Measures to be applied The flange should have sufficient rigidity, change the more gentle gasket, control the parallelism and concentricity requirements.

Gasket material: the reasons for the material and the sealing medium and temperature is not compatible, the installation of gasket stress is too large and so on. Method measures to change the corrosion-resistant gasket, change the pressure capacity of the gasket.

 The well-designed and rational choice of gaskets is important for the effective operation of the gasket, but after a detailed calculation and a reasonable choice of gasket, if the installation is not good in practical applications, it can not expect his other sealing effect to achieve the desired Sealing effect; installed well managed, the life of the gasket will be shortened, so the rational installation of gasket, is to achieve the most critical step in effective sealing. At the same time in operation, for those easy to leak the joints, targeted, focused on regular maintenance, strengthen management, but also to ensure that equipment and management system is stable and reliable operation of the essential measures.

1, before installation, should check the form of flange is in line with the requirements, consult the surface roughness is qualified, there are inorganic damage, radial scoring and corrosion and so on.

2, the bolt and nut the following checks: bolts and nuts of the material, form, size, whether to meet the requirements of the nut in the screw on the rotation should be live, do not shake, for the thread is not allowed to break the phenomenon; There is a bending phenomenon.

3, the gasket to check: gasket material, form, size, whether to meet the requirements, whether to match the flange sealing surface. Gasket surface is not allowed to have mechanical damage, radial scoring, serious corrosion, inside and outside the edge of glass loss and other defects.

4, the installation of oval, human angle section of the metal gasket should be checked before the size of the face of the fence with the flange trapezoidal size of the same, the groove surface is consistent with the waist. Apply the red lead to the contact surface of the gasket to check whether the contact is good. If the contact is bad, it should be ground.

5, before installing the gasket should check the pipe and flange installation quality is the most: partial mouth, wrong mouth, mouth, wrong hole and so on.