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
