What is the Difference Between HTLP60 and HTLP80
Here is the truth, HTLP60 and HTLP80 are incredibly similar products. The primary difference is:
- HTLP60 is rated for use on pipelines that will operate at or below 60C (140F).
- HTLP80 is rated for use on pipelines that will operate at or below 80C (176F).
Other than that, both coating systems create a three layer coating on your field joint, quite similar to a factory applied three layer coating. They use a two part epoxy bonding agent to act as the primary corrosion coating, and the shrink sleeve provides the physical protection for that epoxy through the life of the pipeline.
The shrink sleeve utilizes a specially formulated adhesive sealant (and that sealant is where the maximum operating temperatures come from). Both sleeves also use a radiation crosslinked polyolefin sleeve backing which brings with it excellent penetration resistance and electrical resistance (one of the most important properties of a buried steel pipeline).
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