Currently Caeasr does not address ISO 14692 for analysis of Fiberglass pipe. Based on information from a vendor allowable stress value arrived from CaesarII ( taking LTHS as a basis) is different than calculated by ISO 14692. When and how CaesarII can be utilized for Fiberglass
pipe analysis according to ISO 14692.

Here's my best advice, until we get ISO 14692 implemented at some future date.

ISO 14692 is an extension of the UKOOA code. Major differences between the two are:

1. SIFS are different for bends for piping diameters below 16”.
2. Failure envelopes for ISO-14692 can be slightly more detailed (and therefore less conservative) often being defined by one more data point (having pentagon shape rather than trapezoid shape).
3. Allowable stress levels may be increased for Operating and Occasional load cases, by 24% and 33% respectively, as compared to Sustained load cases.
4. Failure envelopes are defined for different types of joints in ISO 14692.
5. The “f2” term is excluded from the bending stress in ISO-14692, vs. included in UKOOA.

So I would suggest to you:

1. Model and analyze the system in CAESAR II using the UKOOA code.
2. Make sure that the checkbox for “Exclude f2 from UKOOA bending stresses” is checked in the Configure/Setup.
3. If you have ISO 14692 failure envelopes, construct a trapezoid that will fully fit within those envelopes, and use those to get the values you need for UKOOA (Sa(2:1) and R).
4. Use a system factor f2 of 0.67.
5. Calculate the bend SIFs as per ISO-14692 and manually enter any of those which significantly differ from those of BS-7159 (which is what UKOOA references).
6. After analyzing your model, compare your Sustained stresses to 100% of the allowable, your Operating stresses to 124% of the allowable, and your Occasional stresses against 133% of allowable.
7. Where joint strengths may govern, check them manually against the forces from the CAESAR II local force report.

Caution while using ISO 14692:

1. Make sure you have the vendor establish the Qualified pressure or commit the qualified pressure ?
2. The factor F2 have to be picked up frm Table 3 of 7.6.2 of ISO 14692 Part-3 for diff load cases.

3. Also the factor f3 is of importance. Interface with the manufacturer for this value.

Bottomline: All the design factors are related to the QUALIFICATION TESTS OF THE MANUFACTURER. If you are in the early stages of the Project ,have the manufacturer commit to these.

ISO 14692 is a CODE that predominantly addresses QUALIFICATION of GRP Manufacturers and also cautions you that the Stress analysis guidance is for sizes upto 300mm .For sizes above that it also recommends FEM.

Do not approach GRP stress analysis with "A Steel piping" mindset. You can have a Straight pipe with anchors on both sides and still qualify.

In caesar 6.10, the code ISO 14692 can be choosed (that wasn't the case in Caesar 4.50)
Is the “Exclude f2 from UKOOA bending stresses” automaticaly activated when ISO 14692 is selected?

Same question for the "Use FRP SIF" and "Use FRP Flexibilities": are they automaticaly activated when ISO 14692 is choosed?

Those two switches are used if you are NOT using an FRP piping code. If you apply ISO14692, CAESAR II will use the ISO SIFs & flexibilities.