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JB/T 6690-1993Gas turbines - Tolerances and technical requirements for fir-tree roots and grooves of turbine blades (English PDF)

燃气轮机透平叶片枞树型叶根、槽公差及技术要求

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

June 1, 1993

Implementation date

January 1, 1994

Scope

JB/T 6690-1993 is the English-translated version of 燃气轮机透平叶片枞树型叶根、槽公差及技术要求.

JB/T 6690-1993 is the Chinese machinery industry standard covering gas turbines - Tolerances and technical requirements for fir-tree roots and grooves of turbine blades.

It was issued on 1 June 1993 and has been in force since 1 January 1994, as a first edition. The document is under the responsibility of the Ministry of Industry and Information Technology.

This page is published from the official record of the 1993 edition. The figures, limits and tables the standard contains are those of the document itself, delivered in full with the English translation.

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Document preview — JB/T 6690-1993

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

[Preview only]
1 Scope
2 Normative references
3 Terms and definitions
3.1 Type
3.2 Basic parameters
4 Types and basic parameters
4.1 Types
4.2 Model designation
4.3 Nominal operating conditions
4.4 Safety and hygiene
4.5 Welding
4.6 Bridge (After crane operation mechanism assembled)
4.7 Assembly
4.8 Electrical control equipment
4.9 Steel pretreatment and painting
5 Technical requirements
5.1 General requirements
5.2 Safety requirements
5.3 Cold and hot working forming
5.4 Rated load test
5.5 Whole machine noise test
5.6 Static rigidity test
5.7 Dynamic load test
5.8 Crane span deviation
5.9 Diagonal difference of bridge
6 Test methods
6.1 Exit-factory inspection
6.2 Type inspection
7 Inspection rules
7.1 Marking
7.2 Packaging, transportation and storage
7.3 Transportation
7.4 Storage
8 Marking, packaging, transportation and storage
9 标志和标签 9 Marking and labeling

1 Foreword

JB/T 6690-1993 was issued by Ministry of Industry and Information Technology of the People's Republic of China on 1 June 1993.

The JB/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

The document runs to 15 pages in English translation.

2 Scope Preview

JB/T 6690-1993 carries no ICS number and no Chinese Standard Classification code.

This catalogue holds 21,922 other JB/T standards.

Of the 5,298 JB/T standards that do carry an ICS number, 1,460 (28%) fall under ICS 25, in the field of manufacturing engineering.

3 About this standard

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

English translation: about 15 pages

4 Related standards

Standards on related subjects:

JB/T 10384-2002 — Steel castings for flow passage components of small and medium-sized hydraulic turbines

JB/T 56078-1996 — Large hydraulic turbines - Product quality grading

JB/T 6688-1993 — 12-point flange bolts and 12-point flange nuts - Technical specifications

JB/T 5884-2018 — Gas turbine control and protection systems

JB/T 5886-2015 — Specification for fuel gas for combustion in gas turbine

JB/T 5885-2015 — Receipt, storage and handling of liquid fuels for gas turbine

5 Classification and status

Chinese Standard Classification (CCS): K 56

Prefix JB/T: recommended standard.

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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.

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JB/T 6689-1993|JB/T 14222-2021|GB/T 4815-2009|JB/T 6656-1993|JB/T 6658-1993|GB/T 45457.1-2025

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