AS 2971-2002

1 - AS 2971-2002 SERIALLY PRODUCED PRESSURE VESSELS
4 - PREFACE
6 - CONTENTS
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE
8 - 1.2 OBJECTIVE
8 - 1.3 APPLICATION
9 - 1.4 REFERENCED DOCUMENTS
10 - 1.5 DEFINITIONS
10 - 1.5.1 Batch
10 - 1.5.2 Certification body
10 - 1.5.3 Customer
10 - 1.5.4 Design minimum temperature
10 - 1.5.5 Design pressure
10 - 1.5.6 Design temperature
10 - 1.5.7 Design verifier
10 - 1.5.8 Integrated pressure equipment test station (IPETS)
10 - 1.5.9 Serially produced vessels
11 - 1.5.10 Shall
11 - 1.5.11 Should
11 - 1.5.12 Type testing
11 - 1.5.13 Unfired pressure vessel
11 - 1.5.14 Verification
11 - 1.5.15 Verifying organization
11 - 1.6 CLASSIFICATION OF VESSELS
12 - 1.7 DESIGNATION
12 - 1.8 APPLICATION OF CLASSES AND TIERS OF VESSELS
13 - SECTION 2 MATERIALS, DESIGN AND MANUFACTURE
13 - 2.1 MATERIALS
13 - 2.2 DESIGN
13 - 2.2.1 General
13 - 2.2.2 Design pressure
13 - 2.2.3 Crevices
13 - 2.2.4 Cleaning access
14 - 2.2.5 Inspection openings
14 - 2.2.6 Closures
14 - 2.2.7 Drains
14 - 2.3 MANUFACTURE
15 - 2.4 PROTECTIVE DEVICES AND FITTINGS
15 - 2.4.1 Fittings
15 - 2.4.2 Pressure-relief devices
15 - 2.5 CORROSION PROTECTION
16 - SECTION 3 PERFORMANCE REQUIREMENTS
16 - 3.1 GENERAL
16 - 3.2 RESISTANCE TO INTERNAL PRESSURE
16 - 3.3 RESISTANCE TO BURSTING AND FRAGMENTATION
16 - 3.4 RESISTANCE TO FATIGUE
16 - 3.5 RESISTANCE TO DROPPING
16 - 3.6 RESISTANCE TO PENETRATION
16 - 3.7 RESISTANCE TO IMPACT
17 - 3.8 RESISTANCE TO TORQUE
17 - 3.9 CLOSURE
17 - 3.10 RESISTANCE TO CORROSION
18 - 3.11 PRESSURE RELIEF
18 - 3.11.1 Pressure-relief valves or similar devices
18 - 3.11.2 Rupture member
18 - 3.11.3 Fusible plug
18 - 3.11.4 Required discharge capacity
18 - 3.12 MARKING PLATE ADHESION
18 - 3.13 SURFACE QUALITY AND CONFORMANCE
18 - 3.14 OTHER PERFORMANCE CHARACTERISTICS
19 - SECTION 4 MARKING AND INSTRUCTIONS
19 - 4.1 MARKING
19 - 4.1.1 Marks required
19 - 4.1.2 Method of marking
19 - 4.1.3 Location of marks
19 - 4.1.4 Type of marks
19 - 4.2 INSTRUCTIONS
20 - SECTION 5 ASSESSMENT OF COMPLIANCE WITH THE REQUIREMENTS OF THIS STANDARD
20 - 5.1 GENERAL
20 - 5.2 WITNESSING OF TYPE TESTS
20 - 5.3 REPORT OF TYPE TESTING
20 - 5.4 MANUFACTURER’S DATA REPORT
21 - 5.5 AUDITING OF MANUFACTURER’S FACILITIES
21 - 5.6 RETESTS
21 - 5.6.1 Retest after failure of a type test
21 - 5.6.2 Retests after failure of a production test
21 - 5.6.3 Modification
24 - APPENDIX A - INTEGRATED PRESSURE EQUIPMENT TEST STATIONS
24 - A1 SCOPE
24 - A2 GENERAL REQUIREMENTS
24 - A3 SPECIFIC REQUIREMENTS
26 - APPENDIX B - INFORMATION TO BE SUPPLIED BY THE CUSTOMER AND THE MANUFACTURER
26 - B1 INFORMATION TO BE SUPPLIED BY THE CUSTOMER
27 - B2 INFORMATION TO BE SUPPLIED TO THE DESIGN VERIFIER TO OBTAIN DESIGN APPROVAL
28 - APPENDIX C - PROOF PRESSURE TESTS
28 - C1 SCOPE
28 - C2 PRESSURIZING MEDIUM
28 - C3 STATE OF VESSEL
28 - C4 PROCEDURE
28 - C5 REPORT
29 - APPENDIX D - BURST AND FRAGMENTATION TEST
29 - D1 SCOPE
29 - D2 PRESSURIZING MEDIUM
29 - D3 TEST SAMPLES
29 - D4 TEST TEMPERATURE
29 - D5 PREPARATION FOR THE TEST
29 - D6 PROCEDURE
29 - D6.1 General
30 - D6.2 Safety precautions
30 - D7 REPORT
31 - APPENDIX E - FATIGUE TEST
31 - E1 SCOPE
31 - E2 PRESSURIZING MEDIUM
31 - E3 TEST SAMPLE
31 - E4 PROCEDURE
31 - E5 REPORT
32 - APPENDIX F - DROP TEST
32 - F1 SCOPE
32 - F2 APPARATUS
32 - F3 TEST SAMPLES
32 - F4 TEST TEMPERATURE
33 - F5 PREPARATION FOR THE TEST
33 - F6 PROCEDURE
33 - F6.1 General
33 - F6.2 Safety precautions
33 - F7 REPORT
34 - APPENDIX G - PENETRATION TEST
34 - G1 SCOPE
34 - G2 APPARATUS
34 - G3 TEST SAMPLES
34 - G4 TEST TEMPERATURE
34 - G5 PREPARATION FOR THE TEST
34 - G6 PROCEDURE
34 - G6.1 General
34 - G6.2 Orientation
35 - G6.3 Safety precautions
35 - G7 REPORT
36 - APPENDIX H - IMPACT TEST
36 - H1 SCOPE
36 - H2 APPARATUS
36 - H3 TEST SAMPLES
36 - H4 TEST TEMPERATURE
36 - H5 PREPARATION FOR THE TEST
36 - H6 PROCEDURE
36 - H6.1 General
37 - H6.2 Safety precautions
37 - H7 REPORT
38 - APPENDIX I - CORROSION TESTS
38 - I1 SCOPE
38 - I2 APPLICATION
38 - I2.1 Salt spray test
38 - I2.2 Brass-cracking test
38 - I3 SALT SPRAY TEST
38 - I4 BRASS-CRACKING TEST
40 - APPENDIX J - PRESSURE-RELIEF DEVICE TESTS
40 - J1 SCOPE
40 - J2 PRESSURIZING MEDIUM
40 - J3 TEST SAMPLES
40 - J4 PROCEDURE
40 - J4.1 Pressure-relief valves or similar devices
40 - J4.2 Rupture discs or similar devices
41 - J4.3 Fusible plug
41 - J5 REPORT
42 - APPENDIX K - MARKING PLATE ADHESION TEST
42 - K1 SCOPE
42 - K2 PROCEDURE
42 - K3 REPORT
43 - COMMENTARY

Specifies requirements for a method of manufacture of serially produced metallic and non-metallic unfired pressure vessels having a maximum volume of 500 L, and specified limits, related to the vessels contents, on the product of the design pressure and the total vapour space. For such vessels, this method of manufacture based on type testing provides an alternative to the method given in AS 1210. Burst tests and other performance tests on a significant number of representative samples are used to validate design, materials and fabrication, simultaneously.

This Standard specifies requirements for the materials, design, manufacture, inspection and testing of serially produced metallic or non-metallic or combination unfired pressure vessels comprising:(a) A maximum volume of 500 L.(b) A design pressure exceeding 0.05 MPa.(c) A product of the design pressure (in megapascals) and the total vapour space (in litres) that is greater than 1 but less than 3000. Where the vessel contents are classified as harmful or very harmful to AS 4343, the upper limit is 1500 MPa.L. This Standard excludes contents classified as lethal.NOTE: The vapour space is the maximum volume which will contain compressed gas or vapour or liquefied gas or liquid above its atmospheric boiling point.(d) A temperature range of 20C to 150C. Vessels designated outside the range of 0C to 50C require special tests. Refer to Appendices D, F and G where applicable.Such vessels may be refillable or non-refillable.NOTE: Users of this Standard are reminded that it has no legal authority in its own right, but may acquire legal standing if adopted by government or any other authority having jurisdiction, or if specified as part of a commercial contract.

First published as AS 2971-1987.
Second edition 2002.