ASME B40.100 2022

$98.04

ASME B40.100 – 2022 – Pressure Gauges and Gauge Attachments

Published By	Publication Date	Number of Pages
ASME	2022

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Description

This Standard covers analog, dial-type gauges, which, using elastic elements, mechanically sense pressure and indicate it by means of a pointer moving over a graduated scale. It also includes the following attachments installed between the pressure source and gauge(s): diaphragm seals, snubbers, and pressure limiting valves. This Standard does not include gauges of special configuration designed for specific applications, edge reading, deadweight or piston gauges, other gauges not using an elastic element to sense pressure, diaphragm actuated pressure instruments that employ mechanical linkages to transmit the applied pressure, other attachments such as siphons, electric contacts, and gauge isolation valves or other separation devices designed to protect the pressure element assembly.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
7	FOREWORD
8	ASME B40 COMMITTEE ROSTER
9	CORRESPONDENCE WITH THE B40 COMMITTEE
10	Section 1 Scope, References, Definitions 1-1 SCOPE 1-2 REFERENCES
11	1-3 DEFINITIONS
12	Figures Figure 1-3-1 Elastic Elements
13	Figure 1-3-2 Cases
16	Figure 1-3‐3 Cases/Mounting
18	Figure 1-3‐4 Example of a Retard Gauge
19	Figure 1-3‐5 Example of a Suppressed Scale Gauge
21	Section 2 Gauges: Pressure-Indicating Dial Type — Elastic Element 2-1 PRESSURE GAUGES, GENERAL 2-2 GENERAL RECOMMENDATIONS 2-2.1 Gauge Sizes 2-2.2 Typical Ranges. 2-2.3 Construction
22	Figure 2-1-1 Basic Pressure Terms
23	Figure 2-1-2 Typical Pressure Gauge Components (C-Type Bourdon Tube Illustrated)
24	Tables Table 2-2.2-1 Positive Pressure Ranges Table 2-2.2-2 Compound Pressure Ranges
25	Figure 2-2.3.1.5-1 Recommended Case and Mounting Dimensions
26	Table 2-2.3.2.1-1 Definitions of Pressure Various Units
27	2-2.4 Accuracy
28	Table 2-2.4-1 Accuracy Grades/Classes and Recommended Number of Test Points
29	2-2.5 Installation 2-3 SAFETY 2-3.1 General Discussion
31	2-3.2 Safety Recommendations
32	2-4 CLEANLINESS 2-4.1 General 2-4.2 Cleanliness Levels
33	2-4.3 Inspection for Cleanliness 2-4.4 Packaging 2-5 PRESSURE GAUGE TESTING 2-5.1 Calibration Standards Table 2-4.2-1 Cleanliness Levels
34	2-5.2 Verification Test Procedures 2-6 ORDERING PARAMETERS AND RELATED STANDARDS 2-6.1 Order Checklist
35	Figure 2-5.2.4.3-1 Hysteresis and Offset Error Figure 2-5.2.4.3-1 Hysteresis and Offset Error
36	2-6.1.1 Assistance Not Required. 2-6.1.2 Moderate Assistance Required. 2-6.1.3 Detailed Assistance Required. 2-6.2 Conversion Factors (Customary Units to SI Units) Table 2-6.2-1 Conversion Factors Table 2-6.2-1 Conversion Factors
37	Section 3 Diaphragm Seals 3-1 DIAPHRAGM SEALS, GENERAL 3-1.1 Mounting of Diaphragm Seals. 3-1.2 Construction
39	Figure 3-1.2.2.1-1 Upper Housing, Continuous Duty Figure 3-1.2.2.3-1 Upper Housing, Noncontinuous Duty
40	Figure 3-1.2.2.4-1 Upper Housing, Removable (With Capsule Assembly)
41	Figure 3-1.2.2.4-2 Upper Housing, Removable
42	Figure 3-1.2.2.5-1 Upper Housing, Nonremovable
43	Figure 3-1.2.2.6-1 Upper Housing, Flush Flanged
44	Figure 3-1.2.2.8-1 Upper Housing, Inserted Flange Figure 3-1.2.2.9-1 Upper Housing, Flanged Seal
45	Figure 3-1.2.6-1 Lower Housing
46	Figure 3-1.2.7-1 Fastening Methods
47	Figure 3-1.2.10.2-1 Flanged Seal
48	Figure 3-1.2.10.3-1 Threaded Seal
49	Figure 3-1.2.10.3-2 Flanged Seal With Sleeve
50	Figure 3-1.2.10.3-3 Butt Weld Seal Figure 3-1.2.10.3-4 Socket Weld Seal
51	Figure 3-1.2.10.3-5 Welded Seal Saddle
52	3-1.3 Material Selection
53	Figure 3-1.2.10.5-1 In-Line Seal (Crevice Free) Figure 3-1.2.11.1-1 Flushing Ring
54	Figure 3-1.2.14-1 Gauge Isolator
55	3-1.4 Fill Fluids and Selection
56	3-1.5 Selection of a Diaphragm Seal
57	3-1.6 Reuse of Diaphragm Seals 3-1.7 Safety 3-1.8 Filling Diaphragm Seals
59	Figure 3-1.8.2-1 Sealed Setting
60	Figure 3-1.8.2-2 Fill Setting
61	3-1.9 Testing
63	Section 4 Snubbers 4-1 PURPOSE 4-2 GENERAL 4-2.1 Connections 4-2.2 Materials 4-2.3 Types of Snubbers Figure 4-2.3.1-1 Fixed Orifice
64	Figure 4-2.3.2-1 Needle Valve Figure 4-2.3.3-1 Porous Metal Figure 4-2.3.4-1 Felt Plug — Fluid Filled
65	4-2.4 Selection 4-2.5 Performance Figure 4-2.3.5-1 Piston
66	4-3 SAFETY 4-3.1 Scope 4-3.2 General Discussion
67	4-4 TESTING 4-4.1 General 4-4.2 Surge Generation 4-4.3 Comparison Testing 4-4.4 Test Fluid 4-4.5 Test 4-4.6 Equipment
68	4-4.7 Test Procedure
69	Figure 4-4.5.2-1 Test Setup
70	Figure 4-4.5.2-2 Typical Input Surge
71	Figure 4-4.5.3-1 Desirable Snubber Output
72	Section 5 Pressure Limiter Valves 5-1 GENERAL 5-1.1 Purpose 5-1.2 Principle of Operation 5-2 CONSTRUCTION 5-2.1 Piston Type 5-2.2 Diaphragm Type 5-2.3 Relief Valve Type 5-2.4 Bellows Type 5-3 SELECTION OF PRESSURE LIMITER VALVES 5-3.1 System Pressure
73	Figure 5-2.1-1 Piston Type
74	Figure 5-2.2-1 Diaphragm Type
75	Figure 5-2.3-1 Relief Valve Type Figure 5-2.4-1 Bellows Type
76	5-3.2 Closing Range 5-3.3 Reopening Pressure 5-3.4 Materials of Construction 5-3.5 Pulsation/Surge Dampening 5-3.6 Repeatability of Closing Pressure 5-3.7 Rate of Pressure Change 5-3.8 External Venting 5-3.9 Suspended Solids 5-4 INSTALLATION 5-4.1 Connections 5-4.2 Methods of Installation 5-4.3 Setting Pressure Limiter Valves 5-5 SAFETY 5-5.1 Scope
77	5-5.2 General Discussion 5-6 REUSE OF PRESSURE LIMITER VALVES 5-6.1 Chemical Incompatibility 5-6.2 Corrosion/Chemical Attack
78	5-7 TESTING 5-7.1 General 5-7.2 Warning 5-7.3 Evaluation Procedures
79	5-7.4 Production Testing
80	MANDATORY APPENDIX I TEST PROCEDURES USED TO MEASURE NEW GAUGE PERFORMANCE I-1 SCOPE I-2 EVALUATION PROCEDURES
81	Table I-2.3-1 Proof Pressure Testing Specifications Table I-2.4.1-1 Fatigue Testing Cycle Requirements Table I-2.7.1-1 Vibration Test Amplitudes
82	I-3 SELECTION OF GAUGES FOR TESTING
83	Table I-3-1 Types and Number of Gauges to Be Tested Table I-3-2 Selection of Gauges for Testing I-4 REFERENCED DOCUMENTS Table I-3-1 Types and Number of Gauges to Be Tested Table I-3-2 Selection of Gauges for Testing
84	MANDATORY APPENDIX II GAUGES USED ON REGULATORS II-1 GENERAL II-2 SCOPE II-3 RECOMMENDATIONS
85	Table II-3.3-1 Ranges II-4 INSTALLATION
86	II-5 Referenced Documents
87	MANDATORY APPENDIX III SUPPLEMENTAL REQUIREMENTS — NAVAL APPLICATIONS III-1 INTRODUCTION III-2 SCOPE III-3 GENERAL REQUIREMENTS
88	Table III-3.2-1 Positive Pressure Range Designators Table III-3.2-2 Compound Pressure Range Designators Table III-3.2-3 Refrigerant Pressure Gauge Designators Table III-3.2-4 Retard Pressure Gauge Designators Table III-3.2-5 Caisson Pressure Range Designators
89	Figure III-3.3.1.1-1 Case Design
90	III-4 CLEANLINESS AND PACKAGING III-5 VERIFICATION
91	Figure III-3.3.2.2-1 O-Ring Union Assembly Table III-3.3.5-1 Pressure Connection Requirements and Applications
92	Figure III-3.3.5-1 O-Ring Union Nut/Threaded End Detail
93	Table III-3.3.6-1 Gauge Connection Positions Table III-5.2.1.1-1 Inspection Requirements III-6 TEST PROCEDURES AND REQUIREMENTS
95	Figure III-6.9-1 Load Test
96	Table III-6.10-1 Stem-Mounted Gauge Vibration Table III-6.14-1 Conditions for Pressure Integrity Testing III-7 ORDERING PARAMETERS
97	Table III-7.2.1-1 Part Identifying Number (PIN) III-8 OXYGEN PRESSURE GAUGES
98	Table III-8.4-1 Oxygen Service Ranges III-9 REFERENCED DOCUMENTS
99	MANDATORY APPENDIX IV SNUBBERS FOR NAVAL APPLICATIONS IV-1 GENERAL IV-2 SCOPE IV-3 CONNECTIONS
100	Figure IV-3.1.1-1 O-Ring Union Nut/Threaded End Detail
101	IV-4 VERIFICATION
102	Table IV-4.2.1-1 Qualification and Conformance Inspections Table IV-4.2.2.3-1 AQL for Nonconformities
103	Table IV-4.5.1-1 Steady-State Transmission Pressures
104	Figure IV-4.5.2.1-1Suggested Dampening Test Setup Table IV-4.5.3.3-1 Temperature Cycle
105	Table IV-4.5.4.1-1Vibratory Displacement Criteria IV-5 ORDERING PARAMETERS
106	IV-6 REFERENCES