ASTM D6041-97(2002) - 10.11.2002
 
1. Scope

1.1 This specification covers pipe and fittings fabricated by contact molding, for pressures to 150 psi and made of a commercial-grade polyester resin. Included are requirements for materials, properties, design, construction, dimensions, tolerances, workmanship, and appearance.

1.2 This specification does not cover resins other than polyester, reinforcing materials other than glass fibers or fabrication methods other than contact molding.

Note 1—For the purposes of this specification, the term polyester resin will include both polyester and vinylester resins.

1.3 This specification does not cover the design of pipe and fittings intended for use with liquids heated above their flash points.

1.4 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are provided for information purposes only.

1.5 The following precautionary caveat pertains only to Section 10, the test methods portion, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 2—There is no similar or equivalent ISO standard.

 
2. Referenced Documents

B18.22

Type B Narrow Washers

F412-25a

Standard Terminology Relating to Plastic Piping Systems (Includes all amendments and changes 10/8/2025).

D5421-23

Standard Specification for Contact Molded “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Flanges

D3681-23

Standard Test Method for Chemical Resistance of “Fiberglass” (Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a Deflected Condition

D3567-17(2022)

Standard Practice for Determining Dimensions of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and Fittings

D2584-25

Standard Test Method for Ignition Loss of Cured Reinforced Resins

D2583-25

Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor

D1600-18

Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)

D883-26a

Standard Terminology Relating to Plastics (Includes all amendments and changes 6/15/2026).

D638-22

Standard Test Method for Tensile Properties of Plastics

D618-21

Standard Practice for Conditioning Plastics for Testing

C582-23

Standard Specification for Contact-Molded Reinforced Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant Equipment

C581-26

Standard Practice for Determining Chemical Resistance of Thermosetting Resins Used in Glass-Fiber-Reinforced Structures Intended for Liquid Service

NSF Standard 61 Drinking Water System Components—Health Effects Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http://www.nsf.org.

D1599-18(2024)

Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings