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installation process and acceptance of direct buried insulation pipe acceptance standards: 1. on-site inspection: polyurethane insulation and waterproofing materials have two properties. after the materials are in the site, the raw materials must be re-examined. the content of the sprayed polyurethane re-examination mainly includes the density, compression performance, and dimensional stability of the material. note 2 0 2 3 0 8 2 5 what are suitable for in northern china? 2 0 2 3 0 8 2 5 factory interior view factory interior view factory interior view factory interior view factory interior view

installation process and acceptance of direct buried insulation pipe acceptance standards: 1. on-site inspection: polyurethane insulation and waterproofing materials have two properties. after the materials are in the site, the raw materials must be re-examined. the content of the sprayed polyurethane re-examination mainly includes the density, compression performance, and dimensional stability of the material. note 2 0 2 3 0 8 2 5 what are suitable for in northern china? 2 0 2 3 0 8 2 5 factory interior view factory interior view factory interior view factory interior view factory interior view