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 membrane housing of seawater desalting

L: length of pressure container, different from the specification and quantity of film element.
D1: OD of pressure container
S: supporting span of pressure container

Technical requirements:
    The fabricating method of membrane housing should be in accordance with JC692-1998;
    The design pressure of membrane housing is 1000PSI and the permitted scope of work temperature is 7~49
    The leakage test of membrane housing adapts hydraulic test. The test pressure is 1.2 times of the design pressure.