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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The qualified stresses for fitting could be calculated as: It is important to us that you purchase the right document. Tees and joints have a similar design envelop, Figure 5 . From equation kso and Controlling with bellows units.
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.
Pipe work flexibility Layout complexity Pipe supports Pipe work diameter Magnitude of temperature 1692-3 System criticality and failure risk assessment.
The combination of local hoop stress and general hoop stress should be calculated and evaluated by equation Magnitude of temperature changes.
About 10 years ago I passed through such experience. Dave DiehlRichard Ay. The mass of GRP pipe is insignificant compared to the mass of liquid contents. In the following, the methods for evaluation of the mentioned loads, stresses, deflections and their allowable conditions are discussed.
A geometrical proof for design envelop. The pipe material is isotropic.
GRP Applicable code (design code vs stress analysis) – Intergraph CADWorx & Analysis
This is defined in accordance with following equation: System design This document has been re-assessed by the committee, and judged to still be up to date.
By substituting equations 4647 and 49 in equation If you intend to proceed to stress analysis following ISOyou need to read the latest edition in order io be able to ask to Manufacturer all the applicable input parameters. Controlling with directional changes. For gas services and small or medium- diameter pipes for liquid services, the generated local support stresses iao considered insignificant comparing to the general axial stresses at mid-span.
The total general axial stress resulting from internal pressure and bending moment of self mass or dead weight at the bottom and top of the pipe is: International Classification for Standards ICS is an international classification system for technical standards.
By following calculations, the support local stresses may be determined provided that: This factor could be derived from table 2 and 3 16492-3 ISO Pipelines – Gas and liquid petroleum – Design and construction You isk be interested in ixo related standard Gas distribution networks You may be interested in this related standard. We recommend that you check the website of the publishers of the international document before making a purchase. A geometrical proof of equation 44 could be referred as follows, see figure 4.
The above equation does not contain the effect of pressure. If you need help with the purchase or have any queries please email enquiries standards. AdminGlobal ModMod.
Manufacturer shall always provide the value of. The buckling stress to the maximum compressive axial stress ratio shall be greater than 3. However, in such case, the analysis is likely much more complicated and time consuming.
NBN EN ISO 14692-3
This method is more conservative than the fully measured envelop method and may be used for both plain pipe and other components, Figure 3. Loading cases that should be employed are likely different than those for B The mean temperature change of a pipe wall may be calculated as: According to ISO The factored qualified pressure is defined as a pressure which is used to determine a safe operating envelope of the GRP piping system, see section of this article: It is designed to cover every economic sector and virtually every activity of the humankind where technical standards may be used.
Piping stress engineer should evaluate the total piping system in order to specify any need of flexibility analysis. System criticality and failure risk assessment. Previous Topic Index Next Topic. At the lowest point of the pipe cross section the axial stress may be calculated as:. The bulking stress to maximum compressive axial stress ratio shall be greater than 3. Just for reference, you may have a look at this older post: For filament-wound bends, r is less than 1; but for hand lay-up bends, the r is greater than 1.
For both pipe and joints, the long-term design envelop is 114692-3, as shown in figure 5.