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.
|Published (Last):||15 December 2012|
|PDF File Size:||14.1 Mb|
|ePub File Size:||5.51 Mb|
|Price:||Free* [*Free Regsitration Required]|
The bulking stress to maximum compressive axial stress ratio shall be greater than 3. AdminGlobal ModMod.
calcstress | GRP
The induced isi due to lso 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. The magnitude of general axial stresses due to the pipe dead weight bending moment at mid-span may be calculated as: Magnitude of temperature changes.
System criticality and failure risk assessment. 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: The following equations are developed: The supports are flexible, for example they include an elastomeric pad.
1469-23 ISOtwo design envelop have been defined based on available measure data as follows.
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. 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 highly depends on a lay-up configuration of the bend.
This envelope is generally available for a plain pipe, Lso 2. 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.
NBN EN ISO | NBN
Dave Diehl Member Registered: The factored stress for fitting is: Loading cases that should be employed are likely different than those for B Thermally induced loads due to a maximum operating or ambient temperature range could be evaluated.
At the lowest point of the pipe cross section the axial stress 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.
According to ISO For gas services and small or medium- diameter pipes for liquid services, the generated local support stresses are considered insignificant comparing to the general axial stresses at mid-span.
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. Therefore, the equivalent Euler buckling stress is: In the following, the methods for evaluation of the mentioned loads, stresses, deflections and their allowable conditions are discussed.
For definition of system load cases such as sustained, expansion and occasional lso cases, the ASME B It is important to us that you purchase the right document.
However, in such case, the analysis is likely much more complicated and time consuming. This is defined in accordance with following equation: International Classification for Standards ICS is an international classification system for technical standards.
Dave DiehlRichard Ay. If you intend to proceed to stress analysis following ISO14692-33 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
A geometrical proof of equation 44 could be referred as follows, see figure 4. The buckling stress to maximum compressive axial stress ratio shall be greater than 3. The qualified stresses for fitting could be calculated as: System design This document has been re-assessed by the committee, and judged to still 16492-3 up to date.
The mean temperature change of a pipe wall may be calculated as: