AS 1349-1986

1 - AS 1349-1986 BOURDON TUBE PRESSURE AND VACUUM GAUGES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 REFERENCED DOCUMENTS.
6 - 1.3 DEFINITIONS.
6 - 1.3.1 Gauge types.
6 - 1.3.2 Accuracy grades.
7 - 1.3.3 Types of mountings (See Figs 1.1 to 1.5).
8 - 1.3.4 Scales and scale markings (See Fig. 1.6).
8 - 1.3.5 Identification of parts (See Fig. 1.7).
9 - 1.4 UNIT OF PRESSURE.
10 - SECTION 2. GAUGE SIZES AND SCALE RANGES
10 - 2.1 GAUGE SIZES.
10 - 2.1.1 Test gauge.
10 - 2.1.2 Industrial gauge.
10 - 2.2 SCALE RANGES.
10 - 2.2.1 Test gauge.
10 - 2.2.2 Industrial gauge.
11 - SECTION 3. DESIGN AND CONSTRUCTION
11 - 3.1 CASE.
11 - 3.1.1 Material.
11 - 3.1.2 Finish.
11 - 3.1.3 Back of gauge.
11 - 3.1.4 Dust and splash proofing.
11 - 3.1.5 Window.
11 - 3.1.6 Turning radius.
11 - 3.1.7 Mounting of circular surface-mounting gauges
11 - 3.1.8 Mounting of circular flush-mounting gauges
12 - 3.2 SHANK.
12 - 3.2.1 Material.
12 - 3.2.2 Construction.
12 - 3.2.3 Accessibility.
12 - 3.2.4 Screw threads.
12 - 3.2.5 Shank dimensions.
12 - 3.2.6 Seating.
14 - 3.2.7 Seating washers.
14 - 3.2.8 Union connections.
15 - 3.3 BOURDON TUBE AND MOVEMENT.
15 - 3.3.1 Tube anchorage material.
15 - 3.3.2 Construction of tube anchorage.
15 - 3.3.3 Material of Bourdon tube.
15 - 3.3.4 Mounting of Bourdon tube.
15 - 3.3.5 Movement.
15 - 3.4 DIAL AND POINTER.
15 - 3.4.1 Material.
15 - 3.4.2 Pointer.
16 - 3.4.3 Pointer stop.
16 - 3.5 DESIGNATION OF THE SCALE UNIT.
16 - 3.6 SCALE MARKING.
16 - 3.6.1 General.
16 - 3.6.2 Direction of indication.
16 - 3.6.3 Graduation and arrangement.
17 - 3.6.4 Industrial gauges.
17 - 3.6.5 Test gauges.
17 - 3.6.6 Receiver gauges.
17 - 3.7 PROTECTION AGAINST CORROSION.
17 - 3.8 REQUIREMENTS FOR SPECIFIC SERVICE TYPE PRESSURE GAUGES.
17 - 3.8.1 Gauges for use with high pressure gas.
18 - 3.8.2 Pressure gauges for use with oxygen and other oxidants
18 - 3.8.3 Gauges for use with acetylene.
18 - 3.9 GENERAL SAFETY REQUIREMENTS.
19 - SECTION 4. PERFORMANCE AND TESTING
19 - 4.1 ACCURACY.
19 - 4.1.1 Test gauges.
19 - 4.1.2 Industrial gauges.
19 - 4.2 OVERLOAD.
19 - 4.2.1 Test gauges.
19 - 4.2.2 Industrial gauges.
19 - 4.3 TEST APPARATUS.
19 - 4.3.1 Test gauges.
19 - 4.3.2 Industrial gauges.
19 - 4.4 TEST PROCEDURES.
19 - 4.4.1 General.
19 - 4.4.2 Test gauges.
19 - 4.4.3 Industrial gauges.
19 - 4.5 TEST REPORT AND RECORDS.
19 - 4.5.1 Test report.
20 - 4.5.2 Test records.
20 - SECTION 5. MARKING AND PACKAGING
20 - 5.1 MARKING.
20 - 5.2 PACKAGING.
21 - APPENDIX A - NOTES ON THE CORRECTION OF DEADWEIGHT TESTERS AND MANOMETERS
21 - A1 CORRECTIONS TO DEADWEIGHT TESTERS.
21 - A2 CORRECTIONS TO MANOMETERS.
23 - APPENDIX B - RECOMMENDATIONS FOR THE INSTALLATION AND USE OF PRESSURE GAUGES
23 - B1 GENERAL.
23 - B2 METHODS OF MAKING A JOINT.
23 - B2.1 Direct-mounting gauges (i.e. gauges mounted by their connection).
23 - B2.2 Surface-mounting and flush-mounting gauges (i.e. gauges mounted by a flange)
23 - B3 GAUGES FOR STEAM.
25 - B4 TEMPERATURE PROTECTION.
25 - B5 POSITION OF GAUGE.
25 - B6 GAUGES WITH BLOW-OUT BACK.
25 - B7 EFFECT OF LIQUID COLUMNS.
25 - B8 RAPIDLY FLUCTUATING PRESSURES, SHOCK PRESSURES AND VIBRATION
26 - APPENDIX C - PURCHASING GUIDELINES
26 - C1 INFORMATION TO BE SUPPLIED.
26 - C2 ADDITIONAL INFORMATION.

Specifies requirements for gauges within the pressure range -100 kPa to +100 000 kPa, and the nominal size range 50 mm to 300 mm. Compound gauges (pressure and vacuum) are also included. Two accuracy grades are specified, namely test gauges and industrial gauges. The gauges are normally graduated directly in kilopascals, but scale factors of powers to ten may be used where required for scale clarity or specified by the purchaser. Other units of pressure may be specified by the purchaser for special applications. The gauges are generally suitable for use with common fluids such as air, oil, water, or steam, but special provision is made for high pressure gauges, and gauges which are intended for use with oxygen and acetylene, or other reactive gases. Appendices provide notes of correction of deadweight testers and manometers, recommendations for the installation and use of gauges, and purchasing guidelines.

This standard specifies requirements for Bourdon tube pressure and vacuum gauges with circular concentric scales within the pressure range - 100 kPa to + 100 000 kPa, and the nominal size range (approximate dial diameter) 50 mm to 300 mm. Compound gauges (pressure and vacuum) are also included.The gauges are graded according to accuracy, two grades being specified, viz test gauges and industrial gauges. The gauges are generally suitable for use with fluids such as air, oil, water or steam, but special provision is made for gauges which are intended for high pressure applications, or for use with oxygen or acetylene, or with other reactive gases.NOTES:1. Recommendations regarding the installation and use of pressure gauges are given in Appendix B.2. Guidelines for purchasers on specifying requirements when ordering gauges are given in Appendix C.

First published 1973.
Second edition 1986.
Incorporating: Amdt. 1-1987