BS 7201-1:1989

Foreword
Committees responsible
Specification
Section one. General
1 Scope
2 Definition
3 Symbols
4 Information to be exchanged
5 Certificate of compliance
Section two. Materials
6 General
7 Chemical composition
8 Steelmaker's certificate
9 Identification of steel
Section three. Design
10 Design calculations for cylindrical wall thickness
    and spherical formed ends with openings
Section four. Manufacture
11 Approval of design and construction details
12 Manufacturing processes
13 Heat treatment
14 Tolerances
Section five. Performance and testing
15 Hardness
16 Verification of mechanical properties
17 Examination for thickness, surface defects and neck
    folds
18 Resistance to hydraulic pressure
19 Re-heat treatment
20 New design
21 Prototype accumulator bodies
22 Checking of water capacity
23 Records and retests
24 Marking of accumulator bodies
Appendices
A Exchange of information
B Design examples
C Ultrasonic defect detection and thickness
    measurement
D Volumetric expansion testing of seamless accumulator
    bodies
E Proof pressure test
F Specimen certificates
Tables
1 Steel making process and chemical composition
2 Heat treatment and mechanical properties of steel in
    finished accumulator bodies
3 Permissible deviation on product analysis from
    specified range for carbon and carbon manganese
    steels
4 Permissible deviation on product analysis from
    specified range for alloy steels
5 K factors for the compressibility of water
Figures
1 Hardness values related to tensile strengths
2 Accumulator body after machining
3 Area of reinforcement of spherical formed ends
4 Example of apparatus for water jacket method
    (levelling burette)
5 Example of apparatus for water jacket method (fixed
    burette)
6 Non-water jacket method

Materials, design, construction and testing. Appendices give examples of design calculations, pressure test methods and ultrasonic test methods.