irst: the sitewater, electricity and materials storage site conditions can meet the needs;
Second: thesupplied pipes, fittings and accessories comply with the current corporatestandards, and the materials are consistent with the materials, with productspecifications and quality certificates.
Third: theconstruction design drawings and other technical documents are complete andreviewed or reviewed;
Fourth: theconstruction plan or construction organization design has been technicallydelivered;
Fifth: materials,construction personnel, construction machinery, etc. can ensure normalconstruction;