Positive Displacement Pumps— Controlled Volume for Petroleum, Chemical, and Gas Industry Services

API STANDARD 675

THIRD EDITION, NOVEMBER 2012

ERRATA, JUNE 2014

ERRATA 2, APRIL 2015

REAFFIRMED, JULY 2021

Special Notes

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Copyright © 2012 American Petroleum Institute

Foreword

This standard is based on the accumulated knowledge and experience of manufacturers and users of reciprocating, controlled volume pumps. The objective of this standard is to provide a purchase specification to facilitate the procurement and manufacturer of controlled volume pumps for use in petroleum, chemical, and gas industry services.

The primary purpose of this standard is to establish minimum requirements.

Energy conservation is of concern and has become increasingly important in all aspects of equipment design, application, and operation. Thus innovative energy conserving approaches should be aggressively pursued by the manufacturer and the user during these steps. Alternative approaches that may result in improving energy utilization should be thoroughly investigated and brought forth. This is especially true of new equipment proposals, since the evaluation or purchase options will be based increasingly on total life costs as opposed to acquisition cost alone. Equipment manufacturers, in particular, are encouraged to suggest alternatives to those specified when such approaches achieve improved energy effectiveness and reduced total life costs without sacrificing safety or reliability.

This standard requires the Purchaser to specify certain details and features. Although it is recognized that the Purchaser may desire to modify, delete, or amplify sections of this standard, it is strongly recommended that such modifications, deletions, and amplifications be made by supplementing this standard, rather than by rewriting or incorporating sections thereof into another standard.

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.

This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be directed in writing to the Director of Standards, American Petroleum Institute, 200 Massachusetts Avenue, NW, Suite 1100, Washington, DC 20001. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.

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Suggested revisions are invited and should be submitted to the Standards Department, API, 200 Massachusetts Avenue, NW, Suite 1100, Washington, DC 20001, standards@api.org.

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Contents

Page

1. Scope 1

2. Normative References 1

3. Terms and Definitions 4

4. General 10

   1. Unit Responsibility 10

   2. Governing Requirements and Units of Measurement 11

   3. Pump Designations 11

5. Statutory 12

   1. Statutory Requirements 12

   2. Requirements 12

6. Basic Design 13

   1. General 13

   2. Pressure Containing Parts 14

   3. Liquid End Connections 15

   4. Flanges 16

   5. Pump Check Valves 16

   6. Diaphragms 17

   7. Packed Plungers 17

   8. Relief Valve Application 17

   9. Gears 17

   10. Drive Train Enclosure 18

   11. Drive Bearings 18

   12. Lubrication 18

   13. Capacity Adjustment 18

   14. Materials 19

   15. Nameplates and Rotation Arrows 25

7. Accessories 25

   1. Drivers 25

   2. Couplings and Guards 27

   3. Baseplates 28

   4. Pressure-limiting Valves (PLVs) 30

   5. Controls and Instrumentation 30

   6. Auxiliary Piping 30

   7. Special Tools 32

   8. Pulsation Suppression Devices 32

8. Inspection, Testing, and Preparation for Shipment 32

   1. General 32

   2. Inspection Records 33

   3. Testing 35

   4. Preparation for Shipment38

9. Vendor’s Data 40

   1. General 40

   2. Proposals 41

   3. Contract Data 42

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Contents

Page

Annex A (informative) Data Sheets 45

Annex B (informative) Materials 50

Annex C (informative) Inspector’s Checklist 51

Annex D (normative) Controlled Volume Pump Vendor Drawing and Data Requirements 52

Annex E (informative) Net Positive Suction Head Versus Net Positive Inlet Pressure 60

Annex F (informative) Pulsation and Vibration Control Techniques 62

Figures

1. Typical Liquid End Pumps 11

2. Typical Drive End Pumps 12

Tables

1. Welding Requirements 23

2. Minimum Requirements for Piping Materials 31

3. Material Inspection Standards 35

4. Test Tolerances 38

B.1 Miscellaneous Material Specifications 50

Positive Displacement Pumps—Controlled Volume for Petroleum, Chemical, and Gas Industry Services

1. Scope

   This standard covers the minimum requirements for reciprocating, controlled volume pumps and pump units for use in the petroleum, petrochemical, and gas industry services. These pumps are either hydraulic diaphragm or packed plunger design. Rotary positive displacement pumps are not included. Diaphragm pumps that use direct mechanical actuation are also excluded.

   
   

   NOTE See API 674 for positive displacement reciprocating pumps and API 676 for positive displacement rotary pumps.

   
   

   This standard requires the Purchaser to specify certain details and features. A bullet () at the beginning of a paragraph indicates that either a decision by, or further information from, the Purchaser is required. Further information should be shown on the data sheets (see example in Annex A) or stated in the quotation request and purchase order.

   
   

   Alternate Designs and Conflicting Requirements are now located in Section 6.

   
   

   NOTE A bullet (●) at the beginning of a paragraph indicates that either a decision is required or further information is to be provided by the purchaser. This information should be indicated on the data sheets (see Appendix A); otherwise, it should be stated in the quotation request or in the order.

   
   

2. Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. The hierarchy of documents shall be specified.

NOTE Typical documents are user, industry, and API specifications, data sheets, meeting notes and supplemental agreements.

API Specification 5L, Specification for Line Pipe

API Recommended Practice 520, Sizing, Selection and Installation of Pressure-Relieving Devices in Refineries, Part I—Sizing and Selection

API Recommended Practice 520, Sizing, Selection and Installation of Pressure-Relieving Devices in Refineries, Part II—Installation

API Standard 526:2002, Flanged Steel Pressure Relief Valves

API Standard 541:2002, Form-wound Squirrel Cage Induction Motors — 250 Horsepower and Larger

API Standard 546:1997, Brushless Synchronous Machines — 500 kVA and Larger

API Standard 614 Lubrication, Shaft-sealing, and Control-oil Systems and Auxiliaries for Petroleum, Chemical, and Gas Industry Services

API Standard 671, Special Purpose Couplings for Refinery Services

API Recommended Practice 500, Classification of Locations for Electrical Installations in Petroleum Refineries

API Recommended Practice 686, Machinery Installation and Installation Design

AGMA 6013-A06: 2006 1, Standard for Industrial Enclosed Gear Drives

AGMA 6022-C93: 1994 (R 2008), Design Manual for Cylindrical Wormgearing

1 American Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314, www.agma.org.

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