UV Protection of Polypropylene Coating

Question

UV Protection of Polypropylene Coating

djwright (Petroleum)

(OP)

10 Jul 03 05:25

We have some above ground steel pipework with polypropylene (PP) coating in a petro-chemical plant.

Whilst the PP coating has proved to be a very robust for buried pipeline useage, we understand that it will degrade over time in sunlight.

We believe we have 2 options:
a) Strip PP off and use epoxy paint system. This will be time consuming and relatively expensive.
b) Paint or wrap PP to provide UV protection (10 to 15 year design life required).

Does anybody know of products suitable for b). They need to adhere to PP, be UV stable and preferably come in a rnage of colours?

1399 (Materials) · Answer 1 · 2003-07-17 18:57:10

Hi,

You may try some some tapes made of low insaturated butyl elastomers.A brand called Denso Butyl 20 tape is available

http://www.densona.com

djwright (Petroleum) · Answer 2 · 2003-07-22 15:30:50

Thanks for this.

You have pointed me in the right direction.

Regards,

DJ Wright

JimMetalsCeramics (Materials) · Answer 3 · 2003-07-23 01:22:02

There are UV stabilizers for polypropylene. They can usually be dispersed in a solution and then painted on. Carbon black is a useful UV stabilizer. It blocks UV.

Here's an organic one:

http://www.mayzo.com/UVStabilizer.htm

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