Bellows

Metal bellows expansion joints metal bellows as a flexible element, it is pipeline transportation system for compensating displacement, deformation and vibration absorption parts of the structure, with anti-fatigue. High pressure, high temperature resistance, corrosion resistance, culture, long life and other characteristics of products according to GB / T12777-91 standards and with reference to the United States "EJMA" standards, computer optimized design, supported by a complete detection means. You can meet the requirements of all the pipelines. The Company production of various types and specifications of bellows expansion joints, Nominal by DN50 ~ DN4000, pressure range 0.1Mpa ~ 4.0Mpa, if users have other special requirements, users can design scene working conditions or technical documents produced by the user . Bellows, customarily also called expansion joints, or expansion joints. Constituting the body of work by the bellows (an elastic element) and the end of the tube, brackets, flanges, pipe and other accessories. Mainly used in a variety of channels, which can compensate for thermal displacement pipe, mechanical deformation and absorb all kinds of mechanical vibration, serve to reduce pipe deformation stress and improve life of the pipeline effect. Bellows connection and welding connection is divided into two flanges. Buried pipeline compensation commonly used welding (except trench installation) bellows installed and used in claim 1, compensation in the installation should be preceded by checking its models, specifications and pipeline configuration must meet the design requirements. 2, the inner sleeve of the band compensator should pay attention to the direction consistent with the medium flows in the sleeve hinge hinged compensator plane displacement plane should be the same. 3, the need for "cold tight" compensator pre-deformation auxiliary member shall be used which may be removed after the pipe is installed. 4, is strictly prohibited bellows deformation method to adjust the piping installation tolerance, so as not to affect the normal function of the compensator, reduce the role of life and increased piping, equipment, load bearing member. 5, the installation process, welding slag splashing is not allowed to wave the shell surface, does not allow wave shell by other mechanical damage. 6, the compensation element of all activities shall be stuck or limit the external component of its scope of activities, should ensure that all moving parts are working properly. 7. When the pressure test, response times fixed tube rack containing compensation to reinforce the ends of the pipe so that the pipe is not rotating hair and mobile. For compensation for the gas medium and the connecting pipe, pay attention to whether the need for additional water-filled temporary support. 8, after the pressure test, it should be drained as soon as possible wave shell in the water, and quickly dry the surface wave shell. 9, insulating material in contact with the compensator bellows should not contain chlorine ions.