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4. Buried piping
4.1 General
The design is based on the same principles as for overhead or underground piping, taking into account the particularities of the environment in which it will be laid.
Wall thickness is calculated by distinguishing between standard and non-standard cases.
The standard case is that of backfilled trench laying, for which the thickness is calculated taking into account internal pressure and external pressure due to earth pressure.
Non-standard cases correspond to so-called special points:
areas through which machinery passes if the pipe is not protected by a sheath or slab;
subsidence zones ;
...
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Buried piping
Bibliography
References
Standardization
European standards (EN)
- Parties 1 à 7. Tuyauteries industrielles - PrEN 13480 (CEN/TC267) -
- Conduite de transport de gaz - PrEN 1594 (CEN/TC234) -
- Conception, calcul et installation pour tuyauteries pré-isolées, enterrées pour chauffage urbain - PrEN 13241 (CEN/TC107) -
- Brides et leurs assemblages. Règles de calcul des assemblages à brides circulaires avec joint - PrEN 1591 (CEN/TC74) -...
Regulatory texts
European Pressure Equipment Directive (PED) published in the Official Journal of the European Communities on May 29, 1997 and transcribed into French law by Decree 99-1046 of December 13, 1999.
Building codes
CODAP French pressure vessel construction code
CODETI French Industrial Piping Code
EJMA Expension Joint Manufacturers Association Standard
Rules defining the effects of snow and wind
- Eyrolles - NV 65 DTU - 1976
- Power piping. - ANSI B 31-1 - 1973
- Fuel and gas piping. - ANSI...
American codes
Organizations
SNCT Syndicat National de la Chaudronnerie de la tôlerie et de la Tuyauterie industrielle (National Union of Boilermaking, Sheet Metal and Industrial Piping)
CETIM Centre Technique des Industries Mécaniques
UNM Union de Normalisation de la Mécanique
CCAP Commission Centrale des Appareils à Pression of the French State Secretariat for Industry...
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