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API Std 664 (R2019) Spiral Plate Heat Exchangers, First Edition, Includes Errata (2021)
standard by American Petroleum Institute, 03/01/2014
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API STANDARD 664
FIRST EDITION, MARCH 2014
REAFFIRMED, JUNE 2019
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Copyright © 2014 American Petroleum Institute
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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.
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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.
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Spiral Plate Heat Exchangers
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.
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
For the purposes of this document, the following terms and definitions apply.
Channel closures seal-welded at alternate edges such that each chamber is accessible by removing the corresponding hot or cold side end cover.
Distribution chamber at the center of the spiral exchanger.
Spiral passage formed by strips of metal rolled around a center core within an outer shell.
Configuration to seal the edge of the internal spiral plate.
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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