minimum design & construction standards - Martin County, Florida

1. General
SECTION V - SEWAGE FORCE MAINS
All materials, fittings and appurtenances intended for use in pressure pipe systems shall be
designed and constructed for a minimum working pressure of 150 psi unless the specific
application dictates a higher working pressure requirement.
All construction material shall be first quality, not previously used. Damaged or faulty pipe
and materials must be properly replaced.
Standard pressure pipe fittings of size 4 inch ID and larger shall be ductile iron pipe fitted
with mechanical joints. For sizes less than 4 inch ID, fittings shall be suitable to the pipe
material and application and shall be approved by the Department. Only bolts furnished by
the manufacturer for mechanical joints are acceptable.
Pipe gaskets shall be as supplied by the pipe manufacturers.
The accompanying STANDARD DETAIL DRAWINGS indicate specific material
requirements. In general, material requirements will be guided by the latest revisions of the
specifications of AWWA, ANSI, ASTM, and NSF.
2. Pipe Material
PVC Sewer Main 4 inch to 12-inch diameter (4" - 12") shall be DR-18 manufactured to
ductile iron pipe outside dimensions and in compliance with AWWA Standard C900. The
pipe shall have an integral bell end and gasket seal with the joint in compliance with the
requirements of ASTM D3139. The pipe color shall be white or green.
PVC Sewer Main 14 inch to 20 inch diameter (14" - 20") shall be DR-21 manufactured to
ductile iron pipe outside dimensions and in compliance with AWWA C905. The pipe shall
have an internal bell end and gasket seal with the joint in compliance with the requirements
of ASTM D3139. The pipe color shall be white or green.
HDPE sewer main 4 inch to 16 inch in diameter (4” – 16”) shall be DR-11 manufactured to
ductile iron pipe outside dimensions and in compliance with AWWA C906, latest revision
and ASTM F714. The pipe will be extruded from resin meeting specifications of ASTM D-
3350 with a cell classification of type III, class C, category 5, grade P34 polyethylene
compound. The pipe color shall be green or co-extruded green color stripes.
Ductile iron pipe shall conform to latest standards of ANSI/AWWA C150/A21.50 for the
thickness design of Ductile iron pipe and ANSI/AWWA C151/A21.51 for ductile iron pipe
centrifugally cast in metal molds or sand-lined molds. The minimum thickness of the ductile
iron pipe shall be Pressure Class 350 for pipes up to 20-inches and Pressure Class 250 for
pipes larger than 20-inches.
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