ECCCorrosion.com | Filament Wound Pressure Pipe.

Below is a typical cross section of Filament Wound Part.
ASTM Formula for calculating the filament wound pipe side wall thickness:

	Thickness in inches at dimension E D = Diameter in inches H = Head height in inches based on dimension E SG = Specific Gravity of liquid (pounds/cubic foot)
This ASTM formula includes a 10:1 safety factor. Please note that a correctly designed tank does not include the corrosion barrier thickness in the calculation of the wall thickness.

Vacuum ratings are based on a 5 to 1 safety factor for unstiffened pipe.

Ratings are suitable for operating temperatures to 180°F (82°C) with premium resins.

Pressure ratings are based on the specified strain for each "grade".

Standard pressure classes are shown. Custom designs can be provided for specific requirements.

Grade A - Premium grade pipe that includes a 200 mil structural liner and a strain limit of .0012 in./in.

Grade B - Standard grade pipe that includes a 100 mil structural liner and a strain limit of .0014 in./in.

Grade C - Commercial grade pipe that includes a 50 mil structural liner and a strain limit of .0017 in./in.