What is the maximum temperature rating for Rocket Wrap?
The heat distortion temperature (HDT) for the composite system is 514°F (268°C). In accordance with Section 401-3.4.2 of PCC-2, 27°F (15°C) is subtracted from the HDT for Type A (non-leaking) repairs. On Type B (leaking / defect) repairs, 45°F (25°C) is subtracted from the HTD. Our engineered design packages document that the system can handle 487°F / 253°C (Type A) or 469°F / 243°C (Type B).
Why does the TDS show Rocket Wrap is only rated to 350°F (177°C)?
This is a conservative rating. Repairs where the operating or design temperature is above 350°F (177°C) can be successfully completed upon engineering review, approval, and guidance. Additional layers are added to the traditional 4-6 layer count to achieve the maximum rating of 487°F / 253°C (Type A) or 469°F / 243°C (Type B).
Where was the PCC-2 qualification testing performed?
Stress Engineering Services in Houston, TX.
How do you certify installers?
We perform In-person classroom training followed by hands on instruction. Each installer is required to wrap a piece of pipe with a defect that is ultimately sent to Stress Engineering Services for pressure testing.
Do you charge for in-person training?
What temperature(s) were the chemical compatibility tests performed at?
Chemical compatibility was performed in the lab at 77F (25C) and/or in the field up to the maximum operating temperature of the product(s). Our experience with two-part epoxies goes back to 1988
Which substrate material(s) has qualification testing been performed for (Mandatory Appendix 405-IV data)?
Rocket Wrap was qualified on carbon steel. Additional testing will be performed on stainless steel in the near future.
What is the fiber orientation pattern for the fabric? Are any directions weighted more than others?
The fabric is composed of 12K and 6K tows in a biaxial orientation. Eight yarns per inch +/-0.5 for both sizes.
Are there any hold points for applications where fiber orientation is critical? (E.g. patches, large OD repairs, etc.)
Our definition of hold points are pauses in the procedure to check conditions pre wrap, during wrap and post wrap. These topics are part of our training that is required to use our product. Additional hold points are part of specific instructions for customer requested full design packages if needed for critical applications. In these situations, our Engineering Department is fully engaged with the design and planning activities with the customer and selected applicator. The typical wrapping applications do not require additional hold points other than what is routine for providing full and correct preparation for wrapping.
How are large open times between surface preparation and first application handled?
Work times for the saturant, filler, and primer are dependent on the atmospheric conditions, substrate temperature, and volume of product being mixed. Guidelines pertaining to application temperature, pot life, and tack free times are listed on the TDS.
I may have missed it but I didn’t see any cure schedules. Could you either point me in the right direction or provide the relevant documentation?
Please refer to the TDS for additional information regarding curing. The curing for the epoxy is very straightforward, mix appropriate ratios of part A and B, mix thoroughly, saturate and apply fabric as per training, apply compression wrap, allow time for full cure. Remember that environmental conditions will fully dictate cure speed and ultimate hardness.
When designing a repair, is there a check for the possibility of delamination?
PCC-2 is the standard followed for all calculations and related conditions for performing a wrap repair. See section 401-4.7 Live Repairs. If a customer has a situation where they request this specific examination, we would be happy to explore this with them. This is not a routinely used formula.
