GB/T 5656-2008 in English

《GB/T 5656-2008离心泵 技术条件（Ⅱ类）》由TC211（全国泵标准化技术委员会）归口，主管部门为中国机械工业联合会。
本标准规定了具有任何一种驱动形式和安装形式的单级、多级、卧式或立式结构一般用途II类离心泵的技术条件。用于化工流程工业泵(例如符合国际标准GB/T5662要求的泵)是本标准所阐述的典型的泵。

1 Scope

1.1 This standard specifies the requirements for Class II centrifugal pumps of single-stage, multistage, horizontal or vertical construction, with any drive and any installation for general application. Pumps used in the chemical process industries (e.g. those conforming to GB/T 5662) are typical of those covered by this standard.
1.2 This standard includes design features concerned with installation, maintenance and safety for these pumps including baseplate, couplings and auxiliary piping, but it does not specify any requirements for the driver other than those related to its rated power output.
1.3 Where application of this standard has been called for and requires a specific design feature, alternative designs may be offered which meet the intent of this standard provided that the alternative is described in detail.
Pumps not complying with all the requirements of this standard may be offered for consideration provided that all deviations are stated.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 3216 Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1 and 2 (GB/T 3216-2005, ISO 9906:1999, MOD)
GB/T 3767 Acoustics — Determination of sound power levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane (GB/T 3767-1996, eqv ISO 3744:1994)
GB/T 3768 Acoustics — Determination of sound power levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane (GB/T 3768-1996, eqv ISO 3746:1995)
GB/T 4662 Rolling bearings — Static load ratings (GB/T 4662-2003, ISO 76:1987, IDT)
GB/T 5660 End-suction centrifugal pumps — Baseplate and installation dimensions (GB/T 5660-1985, idt ISO 3661:1997)
GB/T 5661 End-suction centrifugal pumps — Dimensions of cavities for mechanical seals and for soft packing (GB/T 5661-2004, ISO 3069:2000, MOD)
GB/T 5662 End-suction centrifugal pumps (rating 16bar) — Designation, nominal duty point and dimensions (GB/T 5662-1985, idt ISO 2858:1975)
GB/T 6062 Geometrical product specifications(GPS) — Surface texture — Profile method — Nominal characteristics of contact (stylus) instruments (GB/T 6062-2002, eqv ISO 3274:1996)
GB/T 6391 Rolling bearings — Dynamic load ratings and rating life (GB/T 6391-2003, ISO 281:1990, IDT)
GB/T 9239.1 Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state — Part 1: Specification and verification of balance tolerances (GB/T 9239.1-2006, ISO 1940-1:2003, IDT)
GB/T l6404 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 1: Measurement at discrete points (GB/T 16404-1996, eqv ISO 9614-1:1993)
GB/T 16404.2 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 2: Measurement by scanning (GB/T 16404.2-1999, eqv ISO 9614-2:1996)
ISO 7005-1 Metallic flanges — Part 1: Steel flanges
ISO 7005-2 Metallic flanges — Part 2: Cast iron flanges
ISO 7005-3 Metallic flanges — Part 3: Copper alloy and composite flanges

3 Terms and Definitions

For the purposes of this standard, the following terms and definitions apply.
3.1
Operating conditionss

Foreword II
Introduction III
1 Scope 1
2 Normative References 1
3 Terms and Definitions 2
4 Design 5
5 Materials 18
6 Shop Inspection and Tests 18
7 Preparation for Dispatch 20
Appendix A (Normative) Centrifugal Pump — Data Sheet 22
Appendix B (Informative) External Forces and Moments on Branches 25
Appendix C (Normative) Enquiry, Proposal, Purchase Order 36
Appendix D (Normative) Documentation After Purchase Order 37
Appendix E (Informative) Examples of Seal Arrangements 38
Appendix F (Informative) Piping Arrangements for Seals 40
Appendix G (Informative) Designation Examples Using References from Appendixes E and F 46
Appendix H (Informative) Checklist 48
Bibliography 50