b.
Test Requirements: Watertight joints shall be tested and shall
meet test requirements of paragraph HYDROSTATIC TEST ON WATERTIGHT
JOINTS. Rubber gaskets shall comply with the oil resistant gasket
requirements of ASTM C 443MASTM C 443. Certified copies of test
results shall be delivered to the Contracting Officer before
gaskets or jointing materials are installed. Alternate types of
watertight joint may be furnished, if specifically approved.
2.3.8.2
External Sealing Bands
Requirements for external sealing bands shall conform to ASTM C 877M ASTM C
877.
2.3.8.3
Flexible Watertight, Gasketed Joints
**************************************************************************
NOTE: The inapplicable type of gasket material
should be deleted. Type 2A1 should be specified
where specific resistance to the action of petroleum
base oils is not required. Type 2B3 has specific
requirements for oil resistance with low swell.
Fill in blank for any other combination of Class and
Grade required.
**************************************************************************
a. Gaskets: When infiltration or exfiltration is a concern for
pipe lines, the couplings may be required to have gaskets. The
closed-cell expanded rubber gaskets shall be a continuous band
approximately 178 mm 7 inches wide and approximately 10 mm 3/8 inch
thick, meeting the requirements of ASTM D 1056, Type 2 [A1] [B3]
[_____], and shall have a quality retention rating of not less
than 70 percent when tested for weather resistance by ozone
chamber exposure, Method B of ASTM D 1171. Rubber O-ring gaskets
shall be 21 mm 13/16 inch in diameter for pipe diameters of 914 mm
36 inches or smaller and 22 mm 7/8 inch in diameter for larger
pipe having 13 mm 1/2 inch deep end corrugation. Rubber O-ring
gaskets shall be 35 mm 1-3/8 inches in diameter for pipe having 25
mm 1 inch deep end corrugations. O-rings shall meet the
requirements of AASHTO M 198 or ASTM C 443 ASTM C 443. Flexible
plastic gaskets shall conform to requirements of AASHTO M 198,
Type B.
b.
Connecting Bands: Connecting bands shall be of the type, size and
sheet thickness of band, and the size of angles, bolts, rods and
lugs as indicated or where not indicated as specified in the
applicable standards or specifications for the pipe. Exterior
rivet heads in the longitudinal seam under the connecting band
shall be countersunk or the rivets shall be omitted and the seam
welded. Watertight joints shall be tested and shall meet the test
requirements of paragraph HYDROSTATIC TEST ON WATERTIGHT JOINTS.
2.3.8.4
PVC Plastic Pipes
Joints shall be solvent cement or elastomeric gasket type in accordance
with the specification for the pipe and as recommended by the pipe
manufacturer.
SECTION 02630
Page 26
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