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Inspection Procedures for expansion joint
a. Cracking. (Sun Checking) Cracking, or crazing may not be serious if only the outer cover is involved and the fabric is not exposed. If necessary, repair on site with rubber cement where cracks are minor. Cracking where the fabric is exposed and torn, indicates the expansion joint should be replaced. Such cracking is usually the result of excess extension, angular or lateral movements. Such cracking is identified by: (1) a flattening of the arch (2) cracks at the base of the arch, and/or (3) cracks at the base of the flange. To avoid future problems, replacement expansion joints should be ordered with control rod units.
b. Blisters-Deformation-Ply Separation. Some blisters or deformations, when on the external portions of an expansion joint, may not affect the proper performance of the expansion joint. These blisters or deformations are cosmetic in nature and do not require repair. If major blisters, deformations and/or ply separations exist in the tube, the expansion joint should be replaced as soon as possible. Ply separation at the flange O.D. can sometimes be observed and is not a cause for replacement of the expansion joint.
c. Metal Reinforcement. If the metal reinforcement of an expansion joint is visible through the cover, the expansion joint should be replaced as soon as possible.
d. Dimensions.
e. Rubber Deterioration.
f. Leakage.
Henan liwei industry Co.,LTD
Address: No.68.Mengjin Road,Shangjie District.Zhengzhou City,Henan Province,, zhengzhou, Henan, China, 450000
Tel: 037167447999
Henan Liwei industry Co., Ltd is lead manufacturer of rubber joint in China. Association and power Equipment Network Union, and joints production unit recommended by China Water Association and National Metallurgy Ministry. Our Liwei brand flexible rubber joints have various heavy calibers, types and high quality in the country. The products series have won four patents and our company is name "Quality and Credit Unit" by Henan Province. Our products have become the first choices for national power design, municipality and metallurgy units.
For Future the company has been devoting itself to creating top products and well serving all clients around the world, Liwei brand products will be a red line between we and the clients for ever.
Should any of these items be of interest to you, please let us know, we will be happy to give you details. As a very active manufactures, we always develop new designs, If you have interest in it, it`s my pleasure to offer news to you regular.
