Skip to product information
1 of 6

PayPal, credit cards. Download editable-PDF & invoice in 1 second!

GB 32284-2015 English PDF (GB32284-2015)

GB 32284-2015 English PDF (GB32284-2015)

Regular price $145.00 USD
Regular price Sale price $145.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB 32284-2015 to get it for Purchase Approval, Bank TT...

GB 32284-2015: Minimum allowable values of energy efficiency and energy efficiency grades for petrochemical centrifugal pumps

This Standard specifies the basic requirements for petrochemical centrifugal pumps, efficiency calculation methods for pumps, energy efficiency grades for pumps, minimum allowable values of energy efficiency for pumps, target minimum allowable values of energy efficiency for pumps, and evaluating values of energy conservation for pumps. This Standard applies to single-stage single-suction pumps and single-stage double-suction pumps with closed (maximum) impellers installed which deliver clean liquids.
GB 32284-2015
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 27.010
F 01
Minimum allowable values of energy efficiency and
energy efficiency grades for petrochemical centrifugal
pumps
ISSUED ON: DECEMBER 10, 2015
IMPLEMENTED ON: JANUARY 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Technical requirements ... 5
Appendix A (Informative) Calculation method of energy efficiency grades for pumps ... 12
Appendix B (Informative) Calculation method of target minimum allowable values of energy efficiency for pumps ... 14
Minimum allowable values of energy efficiency and
energy efficiency grades for petrochemical centrifugal
pumps
1 Scope
This Standard specifies the basic requirements for petrochemical centrifugal pumps (hereinafter referred to as ?€?pumps?€?), efficiency calculation methods for pumps, energy efficiency grades for pumps, minimum allowable values of
energy efficiency for pumps, target minimum allowable values of energy
efficiency for pumps, and evaluating values of energy conservation for pumps. This Standard applies to single-stage single-suction pumps and single-stage double-suction pumps with closed (maximum) impellers installed which deliver clean liquids.
This Standard does not apply to clean-water centrifugal pumps, non-metallic centrifugal pumps, and seal-less rotodynamic pumps.
2 Normative references
The following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document.
GB/T 3215 Centrifugal pumps for petroleum petrochemical and natural gas industries
GB/T 3216 Rotodynamic pumps - Hydraulic performance acceptance tests -
Grades 1, 2 and 3
GB/T 5656 Technical specification for centrifugal pumps - Class II
GB/T 7021 Glossary of terms for centrifugal pump
GB/T 13006 NPSH for centrifugal, mixed flow and axial flow pump
3 Terms and definitions
The terms and definitions as defined in GB/T 7021 and the following ones apply to this document.
3.1 Specified point
The point on the pump performance curve determined by the specified flow and the specified head.
3.2 Minimum allowable values of energy efficiency for pumps
The minimum efficiency of the specified point allowed under the test conditions specified by the standard.
3.3 Target minimum allowable values of energy efficiency for pumps
The minimum efficiency of the specified point allowed after the implementation of this Standard for a certain period of time.
3.4 Evaluating values of energy conservation for pumps
The minimum efficiency of the specified point which shall be achieved to meet the energy conservation certification requirements under the test conditions specified by the standard.
4 Technical requirements
4.1 Basic requirements
4.1.1 The design and manufacture of the pumps should meet the requirements of GB/T 3215 or GB/T 5656.
4.1.2 Unless otherwise agreed with the user, the required NPSH (NPSHR) of the pump?€?s specified point shall comply with the provisions of GB/T 13006. 4.1.3 The test methods of the pumps shall comply with the provisions of GB/T 3216. The allowable tolerance coefficient of the flow (Q), head (H), efficiency (??), and NPSHR of the pump shall comply with Grade 2 regulations of GB/T 3216.
4.2 Calculation methods of pump efficiency and specific speed
4.2.1 Calculation of pump efficiency
Pump efficiency is a percentage of the ratio of pump output power (effective n - Speed, in revolutions per minute (r/min).
4.3 Energy efficiency grades for pumps
The energy efficiency grades for pumps are divided into 3 grades, of which 1 is the highest and 3 is the lowest. The energy efficiency grades for pumps are determined according to Table 1. When the flow is greater than 3000 m3/h, the energy efficiency grade for pump is determined according to the flow Q=3000 m3/h. For an example of calculation method of energy efficiency grades for pumps, see Appendix A.
4.4 Minimum allowable values of energy efficiency for pumps
The minimum allowable values of energy efficiency for pumps shall not be lower than the energy efficiency grade 3 ??3 of Table 1.
4.5 Target minimum allowable values of energy efficiency for pumps
When the flow is in the range of 5 m3/h~3000 m3/h, the target minimum
allowable value ??T0 of energy efficiency for pumps is determined as follows: a) When 120???ns???210, any target minimum allowable value (??T0) of energy
efficiency in the specific speed range shall be found in Figure 1 (or Table 2);
b) When 20???ns< 120 and 210< ns???300, for any target minimum allowable
value (??T) of energy efficiency in the specific speed range, ??T0 shall be found in Figure 1 (or Table 2); then according to Figure 2 (or Table 3) and Figure 3 (or Table 3) respectively, FIND ????. Then according to formula (4), calculate ??T.
Where:
??T - Target minimum allowable value of energy efficiency for pump when
20???ns< 120 and 210< ns???300;
??T0 - Target minimum allowable value of energy efficiency for pump when 120???ns???210;
???? - Pump efficiency correction value when 20???ns< 120 and 210< ns???300.
For an example of calculation method of target minimum allowable values of energy efficiency for pumps, see Appendix B.
Appendix A
(Informative)
Calculation method of energy efficiency grades for pumps
A.1 Example
The performance of the specified point of a single-stage double-suction petrochemical centrifugal pump is: Q=800 m3/h, H=12 m, n=1470 r/min.
Calculate the efficiency value ??1 of energy efficiency grade 1, the efficiency value ??2 of energy efficiency grade 2, and the efficiency value ??3 of energy efficiency grade 3.
A.2 Calculate the specific speed ns of pump
Substitute the above example data into formula (3) to calculate:
A.3 Calculate the efficiency values of energy efficiency grades for pumps A.3.1 Calculate the efficiency value ??1 of energy efficiency grade 1 for pump
The efficiency value ??1 of energy efficiency grade 1 for pump may be calculated as follows:
a) FIND the reference value ??;
According to Figure 1 (or Table 2), when Q=800 m3/h, ??=81.9%.
b) Determine the efficiency correction value ????;
According to Figure 3 (or Table 3), when ns=277.4, ????=2.1%.
c) Calculate the efficiency value ??0 of specified point of pump;
d) Calculate the efficiency value ??1 of grade 1 for pump;
According to Table 1, when Q=800 m3/h, the efficiency value of energy
efficiency grade 1 is:

View full details