NB/T 42056-2015Fundamental technical requirements for inlet valves of small hydraulic turbine (English PDF)

NB/T 42056-2015 is the English-translated version of 小型水轮机进水阀门基本技术条件.

NB/T 42056-2015 is a recommended Chinese energy industry standard setting the fundamental technical requirements for the inlet valves of small hydraulic turbines.

It deals with the technical requirements, the testing, the installation and welding, the operation and maintenance, the scope of supply and spare parts, the acceptance and the guarantees, and the nameplate, packing, transport and storage of these valves.

It applies to turbine inlet butterfly valves of nominal diameter below 1000 mm, ball valves of nominal diameter below 500 mm and gate valves of nominal diameter below 1200 mm.

Chinese classification K55 and international classification 27.140 apply. Cited standards include the GB 150 parts, GB/T 2900.45, GB/T 6388, GB/T 7233.1, GB/T 7233.2, GB/T 12465, GB/T 21718, GB/T 24923, NB/T 42041 and the NB/T 47013 series. Issued on 1 July 2015, it has applied since 1 December 2015.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

NB/T 42128-2017|NB/T 10078-2018|GB/T 14478-2025|GB/T 28572-2025|NB/T 10476-2020|NB/T 42054-2015

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