113室外代供热管道安装施工工艺（Installation technology of 113 outdoor heat supply pipeline）.docVIP

113室外代供热管道安装施工工艺（Installation technology of 113 outdoor heat supply pipeline） The range of 1 This technology is applicable to civil buildings (residential) the saturated vapor pressure of not more than 0.8MPa, the water temperature is less than 150 DEG C for outdoor heating and hot water supply pipeline (including buried trench, or overhead pipeline installation engineering). 2 construction preparation 2.1 material requirements: 2.1.1 pipe: carbon steel pipe, seamless steel pipe, galvanized carbon steel pipe should be product certificate, pipe bending and corrosion, not without flying thorn, double skin and uneven defects. 2.1.2 pipe in accordance with the current standard, with certificates, unbiased buckle, buckle, buckle, messy broken wires and no defects such as angle. 2.1.3 of various types of valves with certificates, specifications, types, strength and tightness test meet the design requirements. Thread without damage, casting without burr, crack free, flexible switch handwheel tight, no damage. 2.1.4 accessories: pressure reducer, trap, filter, compensator, flange should comply with the design requirements and specifications of products should be qualified certificate. 2.1.5 type steel, round steel, pipe, bolts, nuts, oil, hemp, pad, electric welding rod etc. to meet the design requirements. 2.2 main equipments: 2.2.1 tools: grinding wheel saw, threading machine, bench drill, electric welding machine, bending machine etc.. 2.2.2 tools: threading plate, pressure case, pipe wrench, live board, hand saw, hammer, table vice, electric welding tools, steel tape, small line level, etc.. 2.3 operating conditions: 2.3.1 must be installed without waste pipes in the ditch leveling compaction, no debris along the pipeline laying position, gully width and bottom elevation of the correct size checking. The installation of 2.3.2 dry pipe trench, the trench should be built after the cover ditch cover before installing elevator supporting frame. 2.3.3 dry pipe installation o