![header thumbnail](/images/publishers\nen_cover.gif)
NEN EN 12493 : 2013 C1 2015
Current
The latest, up-to-date edition.
![header thumbnail](/images/publishers\nen_cover.gif)
LPG EQUIPMENT AND ACCESSORIES - WELDED STEEL PRESSURE VESSELS FOR LPG ROAD TANKERS - DESIGN AND MANUFACTURE
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
4.1 Suitability
4.2 Pressure retaining parts
4.4 Welding consumables
4.5 Non-metallic materials
5 Tank design
5.1 Design conditions
5.2 Surge plates
5.3 Doubler plates
5.4 Stresses due to motion
5.5 Self-supporting tanks
5.6 Vacuum conditions
5.7 Tank mountings
5.8 Internal pipework
6 Openings
6.1 General
6.2 Reinforcement of openings
6.3 Threaded connections
6.4 Manhole
7 Non-pressure retaining parts
7.1 Attachment welds
7.2 Position of attachment welds
8 Workmanship and construction
8.1 General
8.2 Control of materials
8.3 Acceptable weld details
8.4 Heat treatment and forming
8.5 Welding
8.6 Post-weld heat treatment
8.7 Manufacturing tolerances
8.8 Repairs to pressure envelope and direct
attachment welds
9 Construction and workmanship of internal pipework
10 Inspection and testing
10.1 General
10.2 Mechanical testing
10.3 Non-destructive testing
10.4 Non-destructive testing techniques for welds
10.5 Qualification of non-destructive testing
personnel
10.6 Visual examination of welds
10.7 Acceptance test criteria
10.8 Pressure test
10.9 Capacity
11 External corrosion protection and finishing
11.1 External protection and finishing
11.2 Finishing operations
12 Marking
13 Records and documentation
13.1 Documentation obtained by the manufacturer
13.2 Records prepared by the manufacturer
13.3 Retention and supply of documents
Annex A (normative) Guidance on selection of material
grades
Annex B (normative) Reference temperatures for design
B.1 Introduction
B.2 General
B.3 Developed pressure
B.4 Filling
Annex C (informative) Alternative reference temperatures
for design
C.1 Introduction
C.2 General
C.3 Developed pressure
C.4 Filling
Annex D (normative) Design
D.1 Design stresses
D.2 Design pressure
D.3 Design formulae
D.4 Nozzle reinforcement
D.5 Nozzle reinforcement by pads of flanges
D.6 Nozzle reinforcement by branches
Annex E (informative) Example of joints
Annex F (normative) Allowable tolerances
F.1 Tanks
F.2 Dished end tolerance
F.3 Assembly tolerances
F.4 Attachments, nozzles and fittings
F.5 Overall length
Annex G (normative) Heat treatment
G.1 Method of post-weld heat treatment
G.2 Temperature control
G.3 Temperature limit
G.4 Temperature measurement
Annex H (informative) Typical method for measurement
of shell peaking
H.1 Profile gauge
H.2 Peaking survey
Annex I (normative) Welding imperfections and test
specimens
I.1 Imperfections
I.2 Test specimens
Annex J (informative) Choice of non-destructive test
methods for welds
J.1 Internal imperfections
J.2 Surface imperfections
Annex K (normative) Hydraulic pressure test
K.1 Temporary fittings
K.2 Pressure gauges
K.3 Pressurising agent
K.4 Avoidance of shock
K.5 Applied pressure
Annex L (normative) Name plate
Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.