NB/T 20358.5-2018Cost estimation of nuclear power plant construction project - Part 5: Pipe installation engineering for nuclear island (English PDF)

Foreword

This document was issued on 22 March 2018 by the National Energy Administration of the PRC and takes effect on 1 September 2018.

It is a NB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

It is classified under ICS 01.040.27, Chinese classification F 02.

It replaces NB/T 20358.5-2015, which is superseded.

NB/T 20358 Cost estimation of nuclear power plant construction project, together with NB/T 20355 Cost quota for the building and installation works of the nuclear island of nuclear power plant construction projects, NB/T 20356 Cost quota for the building and installation works of the conventional island of nuclear power plant construction projects and NB/T 20357 Cost quota for machinery shift work of nuclear power plant construction projects, makes up the series of nuclear power quota standards that support the budgeting and pricing of nuclear power construction projects.

NB/T 20358 Cost estimation of nuclear power plant construction project currently consists of 16 parts, composed as follows:

Part 1: Civil works of the nuclear island;

Part 2: Finishing works of the nuclear island;

Part 3: Steel structure works of the nuclear island;

Part 4: Process equipment installation works of the nuclear island;

Part 5: Process pipe installation works of the nuclear island;

Part 6: Ventilation and air conditioning installation works of the nuclear island;

Part 7: Electrical equipment installation works of the nuclear island;

Part 8: Automation and control instrumentation installation works of the nuclear island;

Part 9: Communication equipment installation works of the nuclear island;

Part 10: Anti-corrosion and thermal insulation works of the nuclear island;

Part 11: Civil works of the conventional island;

Part 12: Thermal equipment installation works of the conventional island;

Part 13: Electrical equipment installation works of the conventional island;

Part 14: Commissioning works;

Part 15: Fabrication of modules and the steel containment vessel;

Part 16: Assembly and erection of modules and the steel containment vessel.

This part is Part 5 of NB/T 20358-2018 Cost estimation of nuclear power plant construction project, namely Process pipe installation works of the nuclear island (hereinafter referred to as this part). It was issued by Announcement No. 2 of 2018 of the National Energy Administration, with an approval date of 22 March 2018 and an implementation date of 1 September 2018.

This part supersedes NB/T 20358.5-2015.

This part was proposed by the Nuclear Power Standardization Technical Committee of the energy industry.

This part is under the jurisdiction of the Nuclear Industry Standardization Research Institute.

Main drafting organizations of this part: China Nuclear Power Engineering Co., Ltd.; China Nuclear Power Engineering Co., Ltd. of CGN; Electric Power Planning and Engineering Institute; China Nuclear Industry 23 Construction Co., Ltd.; China Nuclear Industry Huaxing Construction Co., Ltd.; China Nuclear Industry No. 22 Construction Co., Ltd.

Main drafters of this part: Chen Lijuan, Li Wenan, Nie Yi, Zheng Baojun, Tang Qinghui, Shang Xin, Bo Meifang, Yu Rong, Kong Liang, Xie Min, Du Xingfu, Zhang Yanxiao, Yue Liangsheng, Cheng Pu, Liu Xinghua.

The volume opens with explanatory notes to the volume on page 1, and each chapter is preceded by its own explanatory notes setting out the scope of the quotas, the work content covered and the rules for measuring quantities.

1 Scope

NB/T 20358.5-2018 is the Chinese budget estimation norm for pipe installation in the nuclear island, the fifth part of the NB/T 20358 series. Nuclear island pipework is the most expensive piping in any industry, and the reason is not the pipe but the qualification: every weld on a safety class line has to be made by a qualified welder to a qualified procedure, examined by radiography or ultrasonics, and documented in a package that survives for the life of the plant. A metre of pipe that would take an hour in a refinery can take a day here. Estimating that work from first principles is nearly impossible, which is why the state publishes a norm: for each defined unit - a weld of a given diameter, wall thickness and material, in a given position and safety class - it fixes the labour hours, the consumables and the machine time considered necessary. Those quotas are the basis of the estimate, of the tender limit and of the final account, and they are what a foreign supplier or analyst needs in order to read a Chinese nuclear cost estimate rather than guess at it. The nine chapters of this volume run through the pipework of the nuclear island by material and class - carbon steel, alloy and stainless lines, small bore and large bore, shop and field welds - together with the supports and hangers, the valves and specialities, the pressure testing and cleaning, the insulation, and the examination and documentation work that goes with each. The document is one of the sixteen parts of NB/T 20358 and sits alongside the companion series NB/T 20355, 20356 and 20357 covering the other stages of nuclear cost estimation. It was issued on 22 March 2018 by the National Energy Administration, took effect on 1 September 2018, and replaces the 2015 edition.

Chapter 1 begins on page 4 and is preceded by explanatory notes to the chapter on page 5. It sets out the budget quotas for the installation of process piping in the nuclear island, organised by pipe material, by nuclear safety class and by welding process.

Section 1.1 Stainless steel pipe (page 6) contains eight quota groups: Nuclear Class 1 stainless steel pipe with argon arc welding (page 6) and with combined argon arc and electric welding (page 8); Nuclear Class 2 stainless steel pipe with argon arc welding (page 12) and with combined argon arc and electric welding (page 24); Nuclear Class 3 stainless steel pipe with argon arc welding (page 32) and with combined argon arc and electric welding (page 40); and non-nuclear class stainless steel pipe with argon arc welding (page 44) and with combined argon arc and electric welding (page 50).

Section 1.2 Carbon steel pipe (page 52) contains six quota groups: Nuclear Class 2 carbon steel pipe with argon arc welding (page 52) and with combined argon arc and electric welding (page 62); Nuclear Class 3 carbon steel pipe with argon arc welding (page 74) and with combined argon arc and electric welding (page 82); and non-nuclear class carbon steel pipe with argon arc welding (page 96) and with combined argon arc and electric welding (page 101).

Section 1.3 Main steam and main feedwater pipe (page 105) covers the main steam pipe installed by combined argon arc and electric welding (page 105) and the main feedwater pipe installed by combined argon arc and electric welding (page 107).

Section 1.4 Assembly welding of super pipe (page 109) gives the quotas for the shop and site assembly welding of super pipe spools.

Section 1.5 Galvanized steel pipe (page 111) covers galvanized steel pipe with threaded connections (page 111) and with flanged connections (page 113).

Section 1.6 Copper pipe installation (page 114) gives the quotas for the installation of copper piping.

Section 1.7 Non-metallic pipe installation (page 115) covers glass fibre reinforced plastic pipe installed by adhesive bonding (page 115) and rigid plastic pipe installed by adhesive bonding (page 119).

2 Chapter 2 Pipe fitting installation

Chapter 2 begins on page 122 and is preceded by explanatory notes to the chapter on page 123. It sets out the budget quotas for the installation of pipe fittings, following the same breakdown by material, nuclear safety class and welding process as Chapter 1.

Section 2.1 Stainless steel pipe fittings (page 124) contains eight quota groups: Nuclear Class 1 fittings with argon arc welding (page 124) and with combined argon arc and electric welding (page 125); Nuclear Class 2 fittings with argon arc welding (page 129) and with combined argon arc and electric welding (page 136); Nuclear Class 3 fittings with argon arc welding (page 143) and with combined argon arc and electric welding (page 149); and non-nuclear class fittings with argon arc welding (page 152) and with combined argon arc and electric welding (page 156).

Section 2.2 Carbon steel pipe fittings (page 160) contains six quota groups: Nuclear Class 2 fittings with argon arc welding (page 160) and with combined argon arc and electric welding (page 166); Nuclear Class 3 fittings with argon arc welding (page 178) and with combined argon arc and electric welding (page 184); and non-nuclear class fittings with argon arc welding (page 198) and with combined argon arc and electric welding (page 201).

Section 2.3 Installation of main steam and main feedwater pipe fittings (page 206) covers main steam pipe fittings installed by combined argon arc and electric welding (page 206) and main feedwater pipe fittings installed by the same process (page 207).

Section 2.4 Galvanized pipe fittings with threaded connections is given on page 208.

Section 2.5 Copper pipe fitting installation is given on page 210.

Section 2.6 Sprinkler system nozzle installation is given on page 211.

3 Chapter 3 Valve installation

Chapter 3 begins on page 212 and is preceded by explanatory notes to the chapter on page 213. It sets out the budget quotas for valve installation, for valve testing and setting, and for the temporary spool pieces used in place of control valves during construction.

Section 3.1 Installation of stainless steel welded valves (page 214) contains eight quota groups: Nuclear Class 1 valves with argon arc welding (page 214) and with combined argon arc and electric welding (page 215); Nuclear Class 2 valves with argon arc welding (page 217) and with combined argon arc and electric welding (page 220); Nuclear Class 3 valves with argon arc welding (page 223) and with combined argon arc and electric welding (page 226); and non-nuclear class valves with argon arc welding (page 229) and with combined argon arc and electric welding (page 232).

Section 3.2 Installation of stainless steel flanged valves (page 234) covers Nuclear Class 1 valves (page 234), Nuclear Class 2 valves (page 236), Nuclear Class 3 valves (page 239) and non-nuclear class valves (page 242).

Section 3.3 Installation of carbon steel welded valves (page 245) covers Nuclear Class 2 valves with argon arc welding (page 245) and with combined argon arc and electric welding (page 247); Nuclear Class 3 valves with argon arc welding (page 251) and with combined argon arc and electric welding (page 253); and non-nuclear class valves with argon arc welding (page 256) and with combined argon arc and electric welding (page 258).

Section 3.4 Installation of carbon steel flanged valves (page 260) covers Nuclear Class 2 valves (page 260), Nuclear Class 3 valves (page 266) and non-nuclear class valves (page 272).

Section 3.5 Installation of threaded valves (page 276) covers stainless steel threaded valves (page 276) and carbon steel threaded valves (page 278).

Section 3.6 Valve hydrostatic testing and safety valve setting (page 280) covers the hydrostatic testing of stainless steel valves (page 280), the hydrostatic testing of carbon steel valves (page 284) and the setting of safety valves and pressure reducing valves (page 290).

Section 3.7 Installation of remote valve operating devices is given on page 294.

Section 3.8 Fabrication, installation and removal of temporary spool pieces replacing control valves (page 295) covers stainless steel spool pieces (page 295) and carbon steel spool pieces (page 299).

4 Chapter 4 Flange installation

Chapter 4 begins on page 305 and is preceded by explanatory notes to the chapter on page 306. It sets out the budget quotas for the installation of butt-welding, socket-welding, threaded and non-metallic flanges.

Section 4.1 Stainless steel butt-welding flanges (page 307) contains eight quota groups: Nuclear Class 1 flanges with argon arc welding (page 307) and with combined argon arc and electric welding (page 308); Nuclear Class 2 flanges with argon arc welding (page 312) and with combined argon arc and electric welding (page 315); Nuclear Class 3 flanges with argon arc welding (page 318) and with combined argon arc and electric welding (page 320); and non-nuclear class flanges with argon arc welding (page 322) and with combined argon arc and electric welding (page 324).

Section 4.2 Carbon steel butt-welding flanges (page 326) contains six quota groups: Nuclear Class 2 flanges with argon arc welding (page 326) and with combined argon arc and electric welding (page 327); Nuclear Class 3 flanges with argon arc welding (page 333) and with combined argon arc and electric welding (page 335); and non-nuclear class flanges with argon arc welding (page 339) and with combined argon arc and electric welding (page 341).

Section 4.3 Stainless steel socket-welding flanges (page 342) covers Nuclear Class 1 flanges (page 342), Nuclear Class 2 flanges (page 343), Nuclear Class 3 flanges (page 344) and non-nuclear class flanges (page 345), all with argon arc welding.

Section 4.4 Carbon steel socket-welding flanges (page 346) covers Nuclear Class 2 flanges (page 346), Nuclear Class 3 flanges (page 347) and non-nuclear class flanges (page 348), all with argon arc welding.

Section 4.5 Carbon steel threaded flange installation is given on page 349, and Section 4.6 Copper flange installation by oxyacetylene welding on page 351.

Section 4.7 Non-metallic flange installation (page 352) covers glass fibre reinforced plastic flanges installed by adhesive bonding (page 352) and rigid plastic flanges installed by adhesive bonding (page 356).

Throughout Chapter 4 the quotas are graduated by flange size and pressure rating, in the same way as the pipe and fitting quotas of the preceding chapters.

5 Chapter 5 Pipe hydrostatic testing, flushing, blowing, pickling and degreasing

Chapter 5 begins on page 360 and is preceded by explanatory notes to the chapter on page 361. It sets out the budget quotas for the pressure testing and cleaning operations carried out on the installed piping systems.

Section 5.1 Pipe pressure testing (page 362) covers the deionized water hydrostatic test of stainless steel piping (page 362) and the deionized water hydrostatic test of carbon steel piping (page 366).

Section 5.2 Flushing and blowing of piping systems (page 372) covers the deionized water flushing of stainless steel piping (page 372), the deionized water flushing of carbon steel piping (page 376), the oil-free compressed air blowing of stainless steel piping (page 382) and the compressed air blowing of carbon steel piping (page 386).

Section 5.3 Pickling of stainless steel piping is given on page 391.

Section 5.4 Degreasing of carbon steel piping is given on page 393.

Section 5.5 Oil flushing of carbon steel piping is given on page 396.

Section 5.6 Compressed air blast blowing of main steam piping is given on page 398.

Section 5.7 Combined hydrostatic test of the main steam and main feedwater systems is given on page 399.

6 Chapter 6 Fabrication and installation of pipe supports and hangers and metal components, and other works

Chapter 6 begins on page 400 and is preceded by explanatory notes to the chapter on page 401. It sets out the budget quotas for the supporting steelwork and the special mechanical items associated with nuclear island piping.

Section 6.1 Fabrication and installation of pipe supports and hangers (page 402) covers the fabrication and installation of supports and hangers (page 402) and the installation of snubbers (page 406).

Section 6.2 Installation of whip restraints and mechanical penetrations (page 408) covers whip restraint installation (page 408) and mechanical penetration installation (page 412).

7 Chapter 7 Fabrication and installation of plate-rolled pipes and pipe fittings

Chapter 7 begins on page 413 and is preceded by explanatory notes to the chapter on page 414. It sets out the budget quotas for pipes and fittings rolled or formed from plate on site, and for pipe bending.

Section 7.1 Fabrication and installation of plate-rolled pipes (page 415) covers the fabrication of plate-rolled pipes (page 415) and their installation (page 417).

Section 7.2 Fabrication and installation of plate-formed pipe fittings (page 419) covers the fabrication of plate-formed fittings (page 419) and their installation (page 421).

Section 7.3 Pipe bending (page 425) covers the bending of stainless steel piping (page 425) and the bending of carbon steel piping (page 427).

8 Chapter 8 Metal hose installation

Chapter 8 begins on page 429 and is preceded by explanatory notes to the chapter on page 430. It sets out the budget quotas for the installation of metal hoses, distinguished by hose material and by the type of end connection.

Section 8.1 covers stainless steel metal hose installation with argon arc welding (page 431).

Section 8.2 covers stainless steel metal hose installation with flanged connections (page 432).

Section 8.3 covers carbon steel metal hose installation with argon arc welding (page 434).

Section 8.4 covers carbon steel metal hose installation with flanged connections (page 435).

9 Chapter 9 Installation of water supply and drainage and firefighting appliances

Chapter 9 begins on page 436 and is preceded by explanatory notes to the chapter on page 437. It sets out the budget quotas for the plumbing fixtures, drainage items and firefighting appliances installed within the nuclear island buildings.

Section 9.1 Installation of sanitary fixtures and faucets is given on page 442.

Section 9.2 Installation of drain plugs, floor drains and floor cleanouts is given on page 449.

Section 9.3 Installation of firefighting system components is given on page 452, and closes the volume.