Spiral Plate Heat Exchangers

API STANDARD 664

FIRST EDITION, MARCH 2014

REAFFIRMED, JUNE 2019

Special Notes

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Copyright © 2014 American Petroleum Institute

Foreword

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iii

Contents

Page

1. Scope 1

2. Normative References 1

3. Terms and Definitions 1

4. General 3

5. Proposal Information Required 4

6. Drawings and Other Data Requirements 5

   1. Outline Drawings and Other Supporting Data 5

   2. Information Required After Outline Drawings Are Reviewed 6

   3. Reports and Records 7

7. Design 7

   1. General 7

   2. Design Temperatures 8

   3. Design Pressure 8

   4. Fouling Margin 8

   5. Corrosion Allowance 8

   6. Components 8

   7. Supports 14

   8. Cover Gaskets 14

   9. Handling Devices 16

8. Materials 16

   1. General 16

   2. Requirements for Carbon Steel in Sour or Wet Hydrogen Sulfide Service 16

   3. Cover Gaskets 17

9. Fabrication 17

   1. Welding 17

   2. Heat Treatment 17

   3. Gasket Contact Surfaces Other Than Nozzle Flange Facings 17

10. Inspection and Testing 18

    1. Quality Assurance 18

    2. Quality Control 18

    3. Pressure Testing 19

    4. Nameplates 20

11. Preparation for Shipment 20

    1. Protection 20

    2. Identification 21

Annex A (informative) Recommended Practice 22

Annex B (informative) Spiral Plate Heat Exchanger Checklist 28

Annex C (informative) Spiral Plate Heat Exchanger Datasheets 30

Bibliography 39

v

Contents

Figures

Page

1. Typical Cover Clamp Bolting 2

2. Typical Components of Spiral Plate Heat Exchangers 4

3. Typical Designs for Channel Closure 10

4. Typical Center Core Types 11

5. Directions of Forces and Moments on Connections 12

6. Connection Locations for Use with Nozzle Loading Tables 14

1. A Typical Column-mounted Overhead Condenser 24

2. Typical A-frame Mounted Spiral Heat Exchanger with Trunnions 26

Tables

1. Maximum Allowable Nozzle Loading, Where the Connection is on a Distribution Manifold or a

   Centrally Bolted Cover 13

2. Maximum Allowable Nozzle Loading, Where the Connection is on a Cover 13

3. Maximum Allowable Nozzle Loading, on Shell or Dished End 15

4. Gasket Contact Surface Finishes 18

5. Hardness Limits 19

A.1 Indicative Levels of Fouling Margin for Various Process Conditions 25

B.1 Checklist for Spiral Plate Heat Exchangers 29

vi

Introduction

It is necessary that users of this standard be aware that further or differing requirements can be needed for individual applications. This standard is not intended to inhibit a vendor from offering, or the purchaser from accepting, alternative equipment or engineering solutions for the individual application. This can be particularly applicable where there is an innovative or developing technology. Where an alternative is offered, it is the responsibility of the vendor to identify any variations from this standard and provide details.

This standard requires the purchaser to specify certain details and features.

•

A bullet ( ) at the beginning of a section or subsection indicates a requirement for the purchaser to make a decision or provide information (for information, a checklist is provided in Annex B).

In this standard, where practical, U.S. Customary (USC) or other units are included in parentheses for information.

viii

Spiral Plate Heat Exchangers

1. Scope

   
   

   This standard specifies requirements and gives recommendations for the mechanical design, materials selection, fabrication, inspection, testing, and preparation for shipment of spiral plate heat exchangers for the petroleum, petrochemical, and natural gas industries. It is applicable to standalone spiral plate heat exchangers and those integral with a pressure vessel.

   
   

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.

   
   

   NACE MR01031, Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments

   
   

   NACE MR0175, Petroleum and Natural Gas Industries—Materials for Use in H2S-containing Environments in Oil and Gas Production—Parts 1, 2, and 3

   
   

   NACE SP0472, Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments

   
   

3. Terms and Definitions

For the purposes of this document, the following terms and definitions apply.

3.1

alternate channels welded

Channel closures seal-welded at alternate edges such that each chamber is accessible by removing the corresponding hot or cold side end cover.

3.2

center core

Distribution chamber at the center of the spiral exchanger.

3.3

channel

Spiral passage formed by strips of metal rolled around a center core within an outer shell.

3.4

channel closure

Configuration to seal the edge of the internal spiral plate.

3.5

channel spacing

Distance or gap between adjacent spiral plates.

1 NACE International (formerly the National Association of Corrosion Engineers), 1440 South Creek Drive, Houston, Texas 77084-4906, www.nace.org.

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