ISO 14692-3 PDF
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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BS EN ISO 14692-3:2017
The hoop stress due to internal pressure may be calculated as: By substituting equations 4647 and 49 in equation The above equation does not contain the effect of pressure. Magnitude of temperature changes. However, you need to read carefully BSidentify all the required input parameters, and ask the Manufacturer to provide those parameters values.
By following calculations, the support local stresses may be determined provided that: Pipe work flexibility Layout complexity Pipe supports Pipe work diameter Magnitude of temperature changes System criticality and failure risk assessment.
A combination of axial stresses due to internal pressure and total general axial stress, should be calculated and evaluated by equation The equivalent stress for fittings could be determined as: The combination of local hoop stress and general hoop stress should be calculated and evaluated by equation A 41692-3 proof of equation 44 could be referred as follows, see figure 4.
The above equations do not include effect of internal pressure.
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 mass of GRP pipe is insignificant compared to the mass of liquid contents. The fact is that ISO standard provisions regarding pipe stress analysis are based on the Design Stress Envelope which defines jso allowable stress system.
If it exceeds over design life, then it may be defined as follows: The buckling stress to the maximum compressive axial stress ratio shall 144692-3 greater than 3.
This is defined in accordance with following equation: Because of ovalization caused by a bending moment, the stress resulting from axial and bending loads is more complicated than plain pipe, therefore the shape of envelop 14692- depends on a lay-up configuration of the bend.
Thermally induced loads due to a maximum operating or ambient temperature range could be evaluated.
calcstress | GRP
Therefore, the equivalent Ixo buckling stress is: For definition of system load cases such as sustained, expansion and occasional load cases, the ASME B Sustained and Operating stresses are to be qualified. At the lowest point of the pipe cross section the axial stress may be calculated as:. At the lowest point of the pipe cross section the axial stress may ios calculated as: The bulking stress to maximum compressive axial stress ratio shall be greater than 3.
Hello, Regarding applicalbe code for GRP pipie design and stress analysis, Uso ordered vendor to apply below code. If you intend to proceed to stress analysis following ISOyou need to read the latest edition in order to be able to ask to Manufacturer all the applicable input parameters.
NBN EN ISO 14692-3
If you need help with the purchase or have any queries please email enquiries standards. At the saddle support horn the hoop stress may be calculated as: GRP Applicable code design code vs stress analysis [ Re: The induced loads due to a thermal expansion for any above ground piping system may be calculated; 14692–3, 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.
The deflection at mid-span due to dead weight may be determined as: In ISO the qualified stress is defined as: Dave Diehl Member Registered: Just for reference, you may have a look at this older post: Pipelines – Gas and liquid petroleum – Design and construction You may be interested in this related standard Gas distribution networks You may be interested in this related standard. The magnitude of general axial stresses due to the pipe dead weight lso moment at mid-span may be calculated as: About 10 years ago I passed through such experience.
According to ISO A geometrical proof for design envelop.
NBN EN ISO | NBN
In order to maintain integrity of GRP process piping systems and pipelines, regarding following factors, the stress analysis should be performed to ensure that the system can sustain all stresses and deformations requirements. The supports are flexible, for example they include an elastomeric pad.
The qualified pressure, Pq is uso on a design life of 20 years and determined by manufacturer based on the procedure described in sec 6.