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 mass of GRP pipe is insignificant compared to the mass of liquid contents.
Due to the absence of a method for evaluation of these parameters in CAESAR II,some calculation sheets are presented in the calculation sheet section. Previous Topic Index Next Topic. Manufacturer shall always provide the value of.
In the following, the methods for evaluation of the mentioned loads, stresses, deflections and their allowable conditions are discussed. Magnitude of temperature changes. International Classification for Standards ICS is an international classification system for technical standards.
The fact is that ISO standard provisions regarding pipe stress analysis are based on the Design Stress Envelope which defines the allowable stress system. 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.
GRP Applicable code (design code vs stress analysis) – Intergraph CADWorx & Analysis
The combination of local hoop stress and general hoop stress should be calculated and evaluated by equation The idealized long-term envelop could be determined as: For stress analysis, different loading conditions such as internal or external pressure, thermal, occasional and support loadings should be determined, and then the related stresses and loads should be evaluated and finally compared with the corresponding allowable stresses and loads respectively.
In order ieo 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 factored stress for fitting is: The pipe material is isotropic The supports jso flexible, for example they include an elastomeric pad.
Dave DiehlRichard Ay. Controlling with expansion loops. According to figure 3, with assuming: At the highest point of a 1469-23 cross section the axial stress may be calculated 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. Thermally induced loads due to a maximum operating or ambient temperature range could be evaluated.
GRP Applicable code design code vs stress analysis [ Re: The magnitude of general axial stresses due to the pipe dead weight bending moment at mid-span may be calculated as: Just for reference, you may have a look at this older post: At the nadir of saddle supports the hoop stress may be calculated as: In ISOtwo design envelop have been defined based on available measure data as follows.
System criticality and failure risk assessment. If you need help with the purchase or have any queries please email enquiries standards. It is important to us that you purchase the right document.
Pipe work flexibility Layout complexity Pipe supports Pipe work diameter Magnitude of temperature changes System criticality and failure risk assessment. This envelope is generally available for a plain pipe, Figure 2. 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. Controlling with bellows units.
NBN EN ISO 14692-3
Switch to Threaded Mode. A geometrical proof of equation 44 could be referred as follows, see figure 4. The axial stress due to internal pressure could be calculated as: In table 1, acceptance criteria for different load cases, based on ISOare suggested. We recommend that you check the website of the oso of the international document before making a purchase.
A geometrical proof for design envelop. This oso defined in accordance with following equation: The requirements and recommendations apply to layout dimensions, hydraulic design, structural design, detailing, fire endurance, spread of fire and emissions and control of electrostatic discharge. The supports are flexible, for example they include an elastomeric pad.