【正文】 nstallation of power plant must be carried out by professional construction team with essential technical force, checking means and management level. The piping construction of power plant should be carried out according to the basic construction program, and following conditions are necessary: Designing files and other technology documents should be fully ready, and a joint checkup must have been made for construction drawings。 All types of pipes of hydrogen generating system and hydrogen supply system。 All types of pipes in boiler body, and pipes of fume exhaust system, ventilation system, coal system, fuel system, gas burning system and dust removal system。 Nonmetal lining pipes。 Nonferrous (titanium, copper and etc.) pipes。 Temporary pipes used in construction. The code does not apply to the following: Cast iron pipes。s Republic of China The Notification of Issuing the Electric Power Trade Standard The Code of Erection and Acceptance for Electric Power Construction (Piping section) Electric Power Technology [1994] All electric power administrations, all electric power bureau, electric power planning institutes, and electric power construction institutes of provinces (municipalities directly under the Central Government, autonomous regions) and Water and Electric Power Press: For adapting the development of electric power industrial technology and insuring the erection quality of pipes of thermal Power plant, the Code of Erection and Acceptance for Electric Power Construction (piping section) DJ 5679 issued in 1979 had been revised by the ministry. The new code should be looked upon as electric power trade standard and the code number is DL 503194. The standard is approved and issued now and will be go into effect from Oct.!, 1994 and the older version should be abolished at the same time. Any question in the performing should be notified the Construction Cooperating Department of the ministry please. Apr. 9,1994 2 Contents General rules ...................................................................................................................................................... 3 Glossary.............................................................................................................................................................. 5 Checking of pipes, pipe fittings, pipe accessories and valves ............................................................................. 5 General regulations ..................................................................................................................................... 5 Checking of pies ......................................................................................................................................... 5 Checking of pipe fittings ............................................................................................................................. 6 Checking of pipe accessories......................................................................................................................... 6 Checking of valves ....................................................................................................................................... 6 Preparation of pipes, pipe fittings and pipe accessories...................................................................................... 7 General regulations....................................................................................................................................... 7 Elbow pipe ................................................................................................................................................. 7 Processing of reel pipes, pipe fittings and pipe accessories ............................................................................. 8 Processing of supporting and suspending bracket ......................................................................................... 11 Installation of pipes.......................................................................................................................................... 12 General regulations..................................................................................................................................... 12 I Installation of high pressure pipe ................................................................................................................ 13 Installation of medium and low pressure pipe .............................................................................................. 14 Installation of water drainage pipe ............................................................................................................. 15 Installation of valve and flange .................................................................................................................. 15 Installation of supporting and suspending bracket ........................................................................................ 16 Test and clean of pipe system........................................................................................................................... 17 Tightness test of pipe system ..................................................................................................................... 17 Cleaning of pipe system .............................................................................................................................. 18 Acceptance of works ......................................................................................................................................... 19 Appendix A Typical data in the construction and acceptance of pipe system in power plant............................ 19 Appendix B Installation regulation of oxygen pipe and acet