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BS EN 13445-6:2021

BS EN 13445-6:2021

$198.66

Unfired pressure vessels – Requirements for the design and fabrication of pressure vessels and pressure parts constructed from spheroidal graphite cast iron

Published By Publication Date Number of Pages
BSI 2021 68
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This document specifies requirements for the design, materials, manufacturing and testing of pressure vessels and pressure vessel parts intended for use with a maximum allowable pressure, PS, equal or less than:

  • 100 bar when containing gases or liquids in group 1 or 2

  • 1000 bar when containing liquids in group 2 only.

and shell wall thicknesses not exceeding 60 mm, which are constructed of ferritic or austenitic spheroidal graphite cast iron. The thickness limitation of the shell does not apply to thickness of flanges, reinforcements, bosses etc.

NOTE 1 Austenitic spheroidal graphite cast iron grades are principally used for high and low temperature applications and for their corrosion resistance properties.

NOTE 2 The allowable grades of spheroidal graphite cast iron are listed in Tables 5.1-1 and 5.1-2. Service conditions are given in Clause 4.

This document, EN 13445-6 , does not include lamellar graphite cast iron grades for ferritic and austenitic grades, with an elongation after fracture equal or less than 15 % which are explicitly excluded. Requirements for the use of cast irons with an elongation after fracture equal or less than 15 % are given in EN 15776 .

PDF Catalog

PDF Pages PDF Title
2 undefined
10 1 Scope
2 Normative references
11 3 Terms, definitions units and symbols
15 4 Service conditions
16 5 Requirements
25 6 Material testing
26 7 Testing and final assessment
30 8 Pressure vessels constructed of a combination of parts in different materials
9 Marking and documentation
32 Annex A (normative)Technical data for the design calculations
A.1 Purpose
A.2 Technical data
A.2.1 Ferritic spheroidal graphite cast iron according to EN 1563:2018
33 A.2.2 Austenitic spheroidal graphite cast iron according to EN 13835:2012
34 Annex B (informative)Ductility
36 Annex C (informative)Determination of the minimum local wall thickness and minimum required burst test pressure
38 Annex D (normative)Assessment of fatigue life
D.1 Purpose
D.2 Specific definitions
D.3 Specific symbols and abbreviations
39 D.4 Limitations
D.5 General
D.6 Simplified fatigue assessment
D.6.1 Pseudo-elastic stress range
40 D.6.2 Correction factors
D.6.2.1 Correction for wall thickness
D.6.2.2 Correction for temperature
41 D.6.3 Fatigue design curves
47 D.6.4 Allowable number of cycles
D.6.5 Allowable stress range /
D.7 Detailed fatigue assessment
D.7.1 Pseudo-elastic stress ranges
48 D.7.2 Corrections to stress range
D.7.2.1 Correction for wall thickness
D.7.2.2 Correction for temperature
D.7.2.3 Surface finish correction factor
D.7.2.4 Correction for mean stress
49 D.7.2.5 Plasticity correction factors
D.7.3 Fatigue design curves
50 D.7.4 Allowable number of cycles
51 D.7.5 Allowable stress range
D.8 Assessment rule for total fatigue damage
D.9 Repairs of surface imperfections
52 Annex E (normative)Design by analysis for castings
E.1 Introduction
E.2 Special requirements to EN 13445-3:2021, Annex B
E.2.1 Addition to B.8.2.3: Design checks for normal operating load cases
E.2.2 Addition to B.8.2.4: Design checks for testing load cases
E.3 Additions to EN 13445-3:2021, Annex C
53 E.4 Requirements
54 Annex F (informative)Recommendations for in-service validation and inspection
F.1 Purpose
F.2 Tests during operation
55 F.3 Measures to be taken when the calculated allowable fatigue lifetime has been reached
F.3.1 General
F.3.2 Testing of vessels and pressure parts at end of life without indicated damages
F.3.3 Hydraulic testing of vessels and vessel parts with indicated damages
56 Annex G (normative)Specific design requirements
G.1 Scope
G.2 Design
G.2.1 General
57 G.2.2 Cover crown thickness, pressure to convex side
G.2.3 Cover crown thickness, pressure to concave side
G.2.4 Flange thickness
58 Annex H (normative)Experimental cyclic pressure testing procedure
H.1 Purpose
H.1.1 General
H.1.2 Experimental methods and other design methods
H.2 Validity
H.3 Tests requirements
H.3.1 General
H.3.2 Number of parts
59 H.3.3 Procedure
61 H.3.4 Material tests
H.4 Allowable number of cycles
64 Annex Y (informative)History of EN 13445-6
Y.1 Differences between EN 13445-6:2014 and EN 13445-6:2021
65 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/68/EU (Pressure equipment Directive) aimed to be covered

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BS EN 13445-6:2021
$198.66