piping technical clarification (underground pipe gallery)（管道技术交底(地下管廊)）.docVIP

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piping technical clarification (underground pipe gallery)（管道技术交底(地下管廊)）.doc

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piping technical clarification (underground pipe gallery)（管道技术交底(地下管廊)）

Piping technical clarification (underground pipe gallery)（管道技术交底(地下管廊)） This article is contributed by vipcos DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. China Metallurgical Construction Co. Ltd. Shanghai MCC13 zhongyetiangong Shanghai MCC13 Construction Co. Ltd. Shanghai MCC13 Construction Engineering Project Department of Shagang steelmaking Co. Shagang steelmaking project department Technical disclosure Audit date Technical disclosure card Project name time Installation of underground pipe gallery in Rong Sheng steel place Project number maker Participant A survey: the disclosure contents, this work is mainly in the underground pipe installed two continuous casting workshop, pipe gallery and outdoor underground pipe rack pipe handling: 1) first with the crane pipe unloading to the lifting air side, after the car hanging rust coating primer to pipe gallery, made by Xiaoping van inside, the hand pulling hoist with shelves installed; three, construction methods and technical requirements of a request) 1) in addition to oxygen lance of converter soft ring water pipe seamless steel tube (20#), the rest were DN200 in diameter with welded steel pipe and the nominal volume is more than DN200 welded steel pipe (Q235). Manual electric welding, welding materials using J422 electrode; 2) each nozzle connected by V groove butt welding; 3) to strengthen the pipeline corrosion using two bottom two cloth three a before painting to completely remove the coated surface rust, welding slag, burrs, oil, water and other dirt. The rust (pipeline with grinder and wire brushing machine) B pipe weld shall not be painted before pressure test; C coating is uniform, the color should be consistent; the film adhesion, no peeling, bubble and pinhole defects; coating integrity, no damage, flowing; 4) buried pipe should be dug grooves to straight there must be a slope, (less than 1:0.75) di