BS PD5500(2006) : 2006

Committees responsible
Foreword
Summary of pages
Section 1 - General
        1.1 Scope
        1.2 Interpretation
        1.3 Definitions
        1.4 Responsibilities
             1.4.1 Responsibilities of the purchaser
             1.4.2 Responsibilities of the manufacturer
             1.4.3 Responsibilities of the Inspecting Authority
             1.4.4 Certificate of Conformance
        1.5 Information and requirements to be agreed and to
             be documented
             1.5.1 Information to be supplied by the purchaser
             1.5.2 Information to be supplied by the manufacturer
        1.6 Thicknesses
Section 2 - Materials
        2.1 Selection of materials
             2.1.1 General
             2.1.2 Materials for pressure parts
             2.1.3 Materials for non-pressure parts
        2.2 Materials for low temperature applications
        2.3 Nominal design strength
             2.3.1 General
             2.3.2 Notation
             2.3.3 Time-independent design strength
             2.3.4 Time-dependent design strength
Section 3 - Design
        3.1 General
        3.2 Application
             3.2.1 Consideration of loads
             3.2.2 Design criteria
             3.2.3 Design pressure
             3.2.4 Maximum design temperature
             3.2.5 Minimum design temperature
             3.2.6 Thermal loads
             3.2.7 Wind and earthquake loads
        3.3 Corrosion, erosion and protection
             3.3.1 General
             3.3.2 Additional thickness to allow for corrosion
             3.3.3 Linings and coatings
             3.3.4 Wear plates
        3.4 Construction categories and design stresses
             3.4.1 Construction categories
             3.4.2 Design stresses
        3.5 Vessels under internal pressure
             3.5.1 Cylindrical and spherical shells
             3.5.2 Domed ends
             3.5.3 Cones and conical ends
             3.5.4 Openings and nozzle connections
             3.5.5 Flat ends and flat plates
             3.5.6 Spherically domed and bolted ends of the
                   form shown in Figure 3.5-39
        3.6 Vessels under external pressure
             3.6.1 General
             3.6.2 Cylindrical shells
             3.6.3 Conical shells
             3.6.4 Spherical shells
             3.6.5 Hemispherical ends
             3.6.6 Torispherical ends
             3.6.7 Ellipsoidal ends
             3.6.8 Procedure by which the departure from the
                   mean circle may be obtained
       3.7 Supports, attachments and internal structures
            3.7.1 General
            3.7.2 Supports
       3.8 Bolted flanged connections
            3.8.1 General
            3.8.2 Notation
            3.8.3 Narrow-faced gasketted flanges
            3.8.4 Full-faced flanges with soft ring type gaskets
            3.8.5 Ungasketted seal welded flanges
            3.8.6 Reverse narrow-face flanges
            3.8.7 Reverse full-face flanges
            3.8.8 Full-faced flanges with metal to metal contact
       3.9 Flat heat exchanger tubesheets
            3.9.1 Notation
            3.9.2 Characteristics of perforated plates
            3.9.3 Tubesheets of exchangers with floating heads
                  or U-tubes
            3.9.4 Tubesheets of fixed tubesheet exchangers
            3.9.5 Allowable shell and tube longitudinal stresses
            3.9.6 Allowable tube joint end load
            3.9.7 Tubesheet flanged extension with narrow-face gasket
       3.10 Design of welds
            3.10.1 General
            3.10.2 Welded joints for principal seams
            3.10.3 Welded joints for other than principal seams
            3.10.4 Welded joints in time dependent applications
       3.11 Vessels with external jackets or limpet coils
            3.11.1 General
            3.11.2 Jacketted cylindrical shells
            3.11.3 Welded jacket connections
            3.11.4 Cylindrical shells with limpet coils
       3.12 Manholes, inspection openings and quick release
            openings
       3.13 Protective devices for excessive pressure or vacuum
            3.13.1 Application
            3.13.2 Capacity of relief device(s)
            3.13.3 Pressure setting of pressure relieving devices
Section 4 - Manufacture and workmanship
        4.1 General aspects of construction
            4.1.1 General
            4.1.2 Material identification
            4.1.3 Order of completion of weld seams
            4.1.4 Junction of more than two weld seams
            4.1.5 Localized thinning
            4.1.6 Rectification of departures from tolerance
        4.2 Cutting, forming and tolerances
            4.2.1 Cutting of material
            4.2.2 Forming of shell sections and plates
            4.2.3 Assembly tolerances
            4.2.4 Tolerances for vessels subject to internal
                  pressure
            4.2.5 Tolerances for vessels subject to external
                  pressure
            4.2.6 Structural tolerances
        4.3 Welded joints
            4.3.1 General
            4.3.2 Welding consumables
            4.3.3 Preparation of plate edges and openings
            4.3.4 Assembly for welding
            4.3.5 Attachments and the removal of temporary
                  attachments
            4.3.6 Butt joints
            4.3.7 Welding: general requirements
        4.4 Heat treatment
            4.4.1 Preheat requirements
            4.4.2 Normalizing: ferritic steels
            4.4.3 Post-weld heat treatment
            4.4.4 Methods of heat treatment
            4.4.5 Post-weld heat treatment procedure
            4.4.6 Mechanical properties after heat treatment
        4.5 Surface finish
Section 5 - Inspection and testing
        5.1 General
        5.2 Approval testing of fusion welding procedures
        5.3 Welder and operator approval
        5.4 Production control test plates
            5.4.1 Vessels in materials other than 9% Ni steel
            5.4.2 9% Ni steel vessels
        5.5 Destructive testing
        5.6 Non-destructive testing
            5.6.1 General
            5.6.2 Parent materials
            5.6.3 Components prepared for welding
            5.6.4 Non-destructive testing of welded joints
            5.6.5 Choice of non-destructive test methods
                   for welds
            5.6.6 Non-destructive testing techniques for welds
        5.7 Acceptance criteria for weld defects revealed by
            visual examination and non-destructive testing
            5.7.1 General
            5.7.2 Assessment of defects
            5.7.3 Repair of welds
        5.8 Pressure tests
            5.8.1 General
            5.8.2 Basic requirements
            5.8.3 Hydraulic testing
            5.8.4 Pneumatic tests
            5.8.5 "Standard" test pressure
            5.8.6 Proof hydraulic test
            5.8.7 Combined hydraulic/pneumatic tests
            5.8.8 Leak testing
            5.8.9 Vessel nameplate
            5.8.10 Final inspection
        5.9 Inspection requirements for cast components
            5.9.1 Examination
            5.9.2 Defects
            5.9.3 Identification and marking
Annex A Requirements for design where loadings and components
        are not covered by Section 3
Annex B Requirements for cylindrical, spherical and conical
        shells under combined loadings, including wind and
        earthquakes
Annex C Assessment of vessels subject to fatigue
Annex D Requirements for vessels designed to operate
        below 0 degree C
Annex E Recommendations for welded connections of pressure
        vessels
Annex G Recommendations for the design of local loads,
        thermal gradients, etc.
Annex H Recommendations for post-weld heat treatment of
        dissimilar ferritic steel joints
Annex J Recommendations for pressure relief protective devices
Annex K Requirements for design stresses for British
        Standard materials
Annex L Guidance on structural tolerances
Annex M Requirements for establishing the allowable external
        pressure for cylindrical sections outside the circularity
        limits specified in 3.6
Annex N Requirements for vessel design and the provision
        of information concerning UK statutory requirements
        for the demonstration of the continued integrity of
        pressure vessels throughout their service life
Annex Q Recommendations for preparation and testing of production
        control test plates
Annex R Guidance on additional information for flat ends and
        flat plates
Annex S Guidance on optional documentation for supply with vessel
Annex T Recommendations for arc welded tube to tubeplate joints
Annex U Guidance on the use of fracture mechanics analyses
Annex V Requirements for testing and inspection of serially produced
        pressure vessels
Annex W Worked examples
Annex Z Guidance on the application of PD 5500 to pressure
        vessels falling within the scope of the European
        Pressure Equipment Directive
 - Aluminium supplement Requirements for aluminium and aluminium
   alloys in the design and construction of unfired fusion welded
   pressure vessels
 - Copper supplement Requirements for copper and copper alloys
   in the design and construction of unfired fusion welded or
   brazed pressure vessels
 - Nickel supplement Requirements for nickel and nickel alloys
   in the design and construction of unfired fusion welded
   pressure vessels
Index
List of references
Figures
Tables

Specifies requirements for the design, construction, inspection, testing and verification of compliance of new unfired fusion welded pressure vessels.