Nace Rp 0391 Pdf _top_ -

Flanges on FRP pipes require lower torque than steel (typically 40–80 Nm for 4-inch flanges). What happens in reality: A steel-trained crew torques to 200 Nm. Result: flange hub cracking or bolt-hole breakout.

The document includes specific recommendations for storage tank design, piping systems, and the use of specialized alloys or plastics in specific sections of the handling process. nace rp 0391 pdf

: Defined as "ambient," which the standard interprets as temperatures up to 50°C (122°F) Target Systems Flanges on FRP pipes require lower torque than