ISO Petroleum and natural gas industries — Glass-reinforced plastics ( GRP) piping — Part 3: System design. ISO , ISO , ISO , follow each individual phase in the life cycle of a GRP/GRE piping system,. i.e. from design through manufacture to. BS EN ISO gives guidelines for the design of GRP piping systems. The requirements and recommendations apply to layout.
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GRP Applicable code (design code vs stress analysis) – Intergraph CADWorx & Analysis
The magnitude of general axial stresses due to the pipe dead weight bending moment at mid-span may be calculated as: It is designed to cover every economic sector and virtually every activity of the humankind where technical standards may be used. Hello, Regarding applicalbe code for GRP pipie design and stress analysis, I ordered vendor to apply below code. Tees and joints have a similar design envelop, Figure 5 . This method is more conservative than the fully measured envelop method and may be used for both plain pipe and other components, Figure 14962-3.
NBN EN ISO 14692-3
The buckling stress to maximum compressive axial stress ratio shall be greater than 3. The mean 14692–3 change of a pipe wall may be calculated as: The bulking stress to maximum compressive axial stress jso shall be greater than 3. The induced loads due to a thermal expansion for any above ground piping system may be calculated; however, because of the low elasticity modulus values of GRP pipes, the expansion resulting from internal pressure can sometimes be equal in magnitude to thermal expansion.
It is important to us that you purchase the right document. At the saddle support horn the hoop stress may be calculated as: In the design of GRP piping systems, these expansions should be controlled by the following approaches: Sustained and Operating stresses are to be qualified.
calcstress | GRP
Magnitude of temperature changes. System criticality and failure risk assessment. Because of ovalization caused by a bending moment, the stress resulting from axial and bending loads is more isl than plain pipe, therefore the shape of envelop highly depends on a lay-up configuration of the bend.
If Manufacturer is not able to provide all the relevant parameters of the Design Stress Envelope, then BS employment for stress analysis purpose might be a solution.
The buckling stress to the maximum compressive axial stress ratio shall be greater than 3.
The idealized long-term envelop could be determined as: Just for reference, you may have a look at this older post: Deflections in GRP pipes, ixo filled with water, shall not exceed The qualified stresses for fitting could be calculated as: The qualified pressure, Pq is based on a design life of 20 years and determined by manufacturer based on the procedure described in sec 6.
However, you need to read carefully BSidentify all the required input parameters, and ask the Manufacturer to provide those parameters values.
The combination of local hoop stress and general hoop stress should be calculated and evaluated by equation Ixo following equation may be used to determine the allowable hoop stress. The fact is that ISO standard provisions regarding pipe stress analysis are based on the Design Stress Envelope which defines the allowable stress system. Add to your Watched Users.
Dave Diehl Member Registered: In ISOtwo design envelop have been defined based on available measure data as follows. The above equations do not include effect of internal pressure.
GRP Applicable code design code vs stress analysis [ Re: The equivalent stress for fittings could be determined as: A compressive longitudinal stress resulting from axial force may be checked against axial elastic bulking stress as: Although we endeavour to maintain an up-to-date catalogue, on occasion we may not have the latest version of a document, including where it has not yet been provided through an international feed.