ASME B31.5 2022

$98.04

ASME B31.5 – 2022 – Refrigeration Piping and Heat Transfer Components

Published By	Publication Date	Number of Pages
ASME	2022

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Description

ASME B31.5 covers refrigerant, heat transfer components, and secondary coolant piping for temperatures as low as -320°F (-196°C), whether erected on the premises or factory assembled. Users are advised that other piping Code Sections may provide requirements for refrigeration piping in their respective jurisdictions. This Code does not apply to any self-contained or unit systems subject to the requirements of Underwriters Laboratories or other nationally recognized testing laboratory. It also does not apply to water piping; piping designed for external or internal gage pressure not exceeding 15 psi (105 kPa) regardless of size; or pressure vessels, compressors, or pumps. However, B31.5 does include all connecting refrigerant and secondary coolant piping starting at the first joint adjacent to such apparatus. Key changes to this edition include: Acceptable Materials – Specifications (Figure on Reduction in Reduction in Minimum Design Metal Temperature Without Impact Testing) Dimensional Standards (Butt Welds) Heat treatment of welds B31.5 prescribes comprehensive solutions for materials, design, fabrication, assembly, erection, testing and inspection. It also serves as a companion to ASME’s B31.1 Code on Power Piping as well as to the other codes in ASME’s B31 series. Together, they remain essential references for anyone engaged with piping. Careful application of these B31 codes will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes. Intended for designers, owners, regulators, inspectors, and manufacturers of refrigeration piping and heat transfer components.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
7	FOREWORD
8	ASME B31 COMMITTEE ROSTER
10	CORRESPONDENCE WITH THE B31 COMMITTEE
12	INTRODUCTION
14	ASME B31.5-2022 SUMMARY OF CHANGES
16	Chapter I Scope and Definitions 500 GENERAL STATEMENTS 500.1 Scope 500.2 Definitions
20	500.3 Nomenclature Tables Table 500.2-1 Refrigerant Safety Classifications
22	Table 500.2-2 Safety Classifications for Refrigerant Blends
24	Chapter II Design 501 DESIGN CONDITIONS 501.1 General 501.2 Pressure 501.3 Temperature 501.4 Ambient Influences 501.5 Dynamic Effects
25	501.6 Weight Effects 501.7 Thermal Expansion and Contraction Loads 502 DESIGN CRITERIA 502.1 General 502.2 Pressure–Temperature Design Criteria for Piping Components
26	502.3 Allowable Stresses and Other Stress Limits
27	Table 502.3.1-1 Maximum Allowable Stress Values, ksi (Multiply by 1,000 to Obtain psi)
36	Figures Figure 502.3.2-1 Stress Range Reduction Factors
37	502.4 Allowances 503 CRITERIA FOR DESIGN OF PIPING COMPONENTS 504 PRESSURE DESIGN OF PIPING COMPONENTS 504.1 Straight Pipe
38	504.2 Curved Segments of Pipe 504.3 Intersections
40	Figure 504.3.1-1 Reinforcement of Branch Connections
42	Figure 504.3.1-2 Extruded Outlet Header Notation
44	Figure 504.3.1-3 Mechanically Formed Tee Connections in Copper Materials
45	504.4 Closures
46	504.5 Pressure Design of Flanges and Blanks 504.6 Headers
47	504.7 Design of Other Pressure-Containing Components 505 PIPE 505.1 General Figure 504.5.3-1 Blanks
48	505.2 Nonferrous Pipe or Tube 506 FITTINGS, BENDS, AND INTERSECTIONS 506.1 Fittings 506.2 Bends and Intersections 506.3 Limitation on Materials for Fittings 507 VALVES 508 FLANGES, BLANKS, FLANGE FACINGS, GASKETS, AND BOLTING 508.1 Flanges 508.2 Blanks 508.3 Flange Facings 508.4 Gaskets 508.5 Bolting
49	510 PIPING JOINTS 510.1 General 511 WELDED JOINTS 511.1 General 511.2 Butt Welds 511.3 Socket Welds 511.4 Fillet Welds 511.5 Seal Welds 512 FLANGED JOINTS 513 EXPANDED JOINTS 514 THREADED JOINTS
50	515 FLARED, FLARELESS, AND COMPRESSION JOINTS 515.1 Selection and Application 515.2 Piping Joints With Applicable Standards 515.3 Piping Joints Without Applicable Standards 517 BRAZED AND SOLDERED JOINTS 518 SLEEVE COUPLED AND OTHER NOVEL OR PATENTED JOINTS 519 EXPANSION AND FLEXIBILITY 519.1 General Table 514-1 Minimum Thickness of External Threaded Components
51	519.2 Concepts
52	519.3 Properties 519.4 Analysis for Bending Flexibility
53	Table 519.3.1-1 Thermal Expansion Data, e (USC and SI)
54	Table 519.3.2-1 Moduli of Elasticity, E (USC and SI)
55	Table 519.3.6-1 Flexibility Factor, k, and Stress Intensification Factor, i
58	Figure 519.4.5-1 Bends
59	Figure 519.4.5-2 Branch Connections
60	520 DESIGN OF PIPE SUPPORTING ELEMENTS 520.1 General
61	521 DESIGN LOADS FOR PIPE SUPPORTING ELEMENTS 521.1 General 521.2 Resilient Variable-Support and Constant-Support Types 521.3 Design Details
62	Table 521.3.1-1 Minimum Sizes of Straps, Rods, and Chains for Hangers
63	Chapter III Materials 523 MATERIALS — GENERAL REQUIREMENTS 523.1 Materials and Specifications 523.2 Limitations on Materials
64	Table 523.1-1 Acceptable Materials — Specifications
68	Figure 523.2.2-1 Reduction in Minimum Design Metal Temperature Without Impact Testing
69	523.3 Deterioration of Materials in Service 524 MATERIALS APPLIED TO MISCELLANEOUS PARTS 524.1 Gaskets 524.2 Bolting Table 523.2.2-1 Impact Exemption Temperatures
70	Chapter IV Dimensional Requirements 526 DIMENSIONAL REQUIREMENTS FOR STANDARD AND NONSTANDARD PIPING COMPONENTS 526.1 Standard Piping Components 526.2 Nonstandard Piping Components 526.3 Threads
71	Table 526.1-1 Dimensional Standards
73	Chapter V Fabrication and Assembly 527 WELDING 527.1 Material 527.2 Preparation
74	527.3 Procedure Figure 527.1.2-1 Typical Joints With Backing Ring Figure 527.2.1-1 Butt Welding End Preparation
75	Figure 527.2.1-2 Internal Trimming for Butt Welding of Piping Components With Internal Misalignment
76	Figure 527.3.3-1 Fillet Weld Size
77	Figure 527.3.3-2 Welding Details for Slip-On and Socket Welding Flanges, and Some Acceptable Types of Flange Attachment Welds Figure 527.3.3-3 Minimum Welding Dimensions Required for Socket Welding Components Other Than Flanges Figure 527.3.5-1 Typical Welded Branch Connection Without Additional Reinforcement Figure 527.3.5-2 Typical Welded Branch Connection With Additional Reinforcement Figure 527.3.5-3 Typical Welded Angular Branch Connection Without Additional Reinforcement
78	Figure 527.3.5-4 Some Acceptable Types of Welded Branch Attachment Details Showing Minimum Acceptable Welds
79	Figure 527.3.5-5 Some Acceptable Details for Integrally Reinforced Outlet Fittings
80	527.4 Responsibility
81	Figure 527.3.6-1 Acceptable Welds for Flat Plate Closures
82	527.5 Qualification Records 527.6 Defect Repairs 528 BRAZING AND SOLDERING 528.1 Brazing Materials 528.2 Brazing Preparation and Procedures 528.3 Soldering Materials Figure 527.3.6-2 Unacceptable Welds for Flat Plate Closures
83	528.4 Soldering Preparation and Procedure 529 BENDING — HOT AND COLD 529.1 Radii of Bends 529.2 Procedure 529.3 Heat Treatment 530 FORMING 530.1 Procedure 530.2 Heat Treatment 531 HEAT TREATMENT 531.1 Heating and Cooling Method 531.2 Preheating 531.3 Postheat Treatment
84	535 ASSEMBLY 535.1 General 535.2 Bolting Procedure 535.3 Threaded Piping 535.4 Welded Joints
85	535.5 Brazed Sleeve Joints 535.6 Soldered Sleeve Joints 535.7 Flare-Type Fitting Joints 535.8 Flareless and Compression-Type Fitting Joints 535.9 Assembly of Hangers 535.10 Piping Identification
86	Table 531.2.1-1 Heat Treatment of Welds
89	Chapter VI Examination, Inspection, and Testing 536 EXAMINATION 536.1 Definition 536.2 Responsibility 536.3 Examination Personnel Qualification and Certification 536.4 Required Examination
90	536.5 Supplementary Examination 536.6 Types of Examinations
91	537 INSPECTION 537.1 Definition 537.2 Responsibility 537.3 Rights of Inspectors 537.4 Qualifications of the Owner’s Inspector 538 TESTING 538.1 Testing Before Erection or Assembly 538.2 Preparation for Testing 538.3 Factory Testing of Refrigerant Piping 538.4 Field Testing of Refrigerant Piping
92	538.5 Testing Medium for Refrigerant Piping 538.6 Pressure Tests for Secondary Coolant Piping 538.7 Pressure Gages 538.8 Repair of Joints 539 RECORDS 539.1 Definition 539.2 Responsibility 539.3 Extent and Retention of Records
94	MANDATORY APPENDIX I REFERENCED STANDARDS
97	NONMANDATORY APPENDIX A SELECTING APPLICABLE PIPING CODES A-1 GENERAL A-2 ASME B31 CODES
98	A-3 OTHER PIPING CODES
99	NONMANDATORY APPENDIX B NOMENCLATURE
100	Table B-1 Nomenclature