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Depth Limit | Temperature Range | U | |
(m) | (oC) | (W/m2/K) | |
Anti-corrosion | |||
Polyethylene | >1,000 m | 60-80 | |
Polypropylene | >1,000 m | 110-135 | |
Polychloroprene | >1,000 m | 90-100 | |
EPDM | >1,000 m | 135-150 | |
Insulation (High U) | |||
Polypropylene (thick) | >1,000 m | 110-135 | U < 10 |
Polychloroprene (thick) | >1,000 m | 90-100 | U < 10 |
EPDM (thick) | >1,000 m | 135-150 | U < 10 |
Solid polyurethane | >1,000 m | 100-115 | U < 8 |
Insulation (Medium U.) | |||
Foamed polypropylene | <600 m | 50-120 | 4 <U<10 |
Syntactic polypropylene | >1,000 m | 110 | 5 <U<10 |
Syntactic polyurethane Conventional | <300 m | 100-115 | 2.5 <U<10 |
Glass beads | >1,000 m | ~100 | 2 <U<4 |
Insulation (Low U) | |||
Glass syntactic epoxies | >1,000 m | ~100 | 2 <U<4 |
Pipe in pipe / jacket | various | 100-150 | U <1 |
EPDM = ethylene propylene diene monomer
U is the thermal transmittance (higher Us mean less insulating)
