ASTM D2992-12
Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for ldquo;Fiberglassrdquo; (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings

Standard No.

ASTM D2992-12

Release Date

2012

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D2992-18

Latest

ASTM D2992-22

Scope

This practice is useful for establishing the hoop stress or internal pressure versus time-to-failure relationships, under selected internal and external environments which simulate actual anticipated product end-use conditions, from which a design basis for specific piping products and materials can be obtained. This practice defines an HDB for material in straight, hollow cylindrical shapes where hoop stress can be easily calculated, and a PDB for fittings and joints where stresses are more complex.

An alternative design practice based on initial strain versus time-to-failure relationships employs a strain basis HDB instead of the stress basis HDB defined by this practice. The strain basis HDB is most often used for buried pipe designs with internal pressures ranging from 0 to 250 psig (1.72 MPa).

To characterize fiberglass piping products, it is necessary to establish the stress versus cycles or time to failure, or pressure versus cycles or time to failure relationships over three or more logarithmic decades of time (cycles or hours) within controlled environmental parameters. Because of the nature of the test and specimens employed, no single line can adequately represent the data. Therefore, the confidence limits should be established.

Pressure ratings for piping of various dimensions at each temperature may be calculated using the HDS determined by testing one size of piping provided that the same specific process and material are used both for test specimens and the piping in question.

Pressure ratings at each temperature for components other than straight hollow shapes may be calculated using the HDP determined by testing one size of piping provided that (1) the specific materials and manufacturing process used for the test specimens are used for the components, (2) for joints, the joining materials and procedures used to prepare the test specimens are used for field joining, and (3) scaling of critical dimensions is related to diameter and pressure rating of the component.

Note 88212;Scaling of fittings and joints should be further verified by short-time testing in accordance with Test Method D1599.

Results obtained at one set of environmental conditions should not be used for other conditions, except that higher temperature data can be used for design basis assignment for lower application temperatures. The design basis should be determined for each specific piping product. Design and processing can significantly affect the long-term performance of piping products, and therefore should be taken into consideration during any evaluation.

This practice is valid for a given pipe or fitting only so long as the specimens are truly representative of that material and manufacturing process.

Changes in materials or manufacturing processes will necessitate a reevaluation as described in Section 12.

PROCEDURE A

Top

1.1 This practice establishes two procedures, Procedure A (cyclic) and Procedure B (static), for obtaining a hydrostatic design basis (HDB) or a pressure design basis (PDB) for fiberglass piping products, by evaluating strength-regression data derived from testing pipe or fittings, or both, of the same materials and construction, either separately or in assemblies. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipe.

Note 18212;For the purposes of this standard, polymer does not include natural polymers.

1.2 This practice can be used for the HDB determination for fiberglass pipe where ......

ASTM D2992-12 Referenced Document

• ASTM D1598 Standard Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure
• ASTM D1599 Standard Test Method for Resistance to Short-Time Hydraulic Failure Pressure of Plastic Pipe, Tubing, and Fittings
• ASTM D1600 Standard Terminology for Abbreviated Terms Relating to Plastics
• ASTM D2143 Standard Test Method for Cyclic Pressure Strength of Reinforced, Thermosetting Plastic Pipe
• ASTM D3567 Standard Practice for Determining Dimensions of ldquo;Fiberglassrdquo; (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and Fittings
• ASTM D618 Standard Practice for Conditioning Plastics for Testing
• ASTM D883 Standard Terminology Relating to Plastics
• ASTM F412 Standard Terminology Relating to Plastic Piping Systems
• ASTM F948 Standard Test Method for Time-to-Failure of Plastic Piping Systems and Components Under Constant Internal Pressure With Flow

ASTM D2992-12 history

• 2022 ASTM D2992-22 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
• 2018 ASTM D2992-18 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
• 2012 ASTM D2992-12 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for ldquo;Fiberglassrdquo; (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
• 2006 ASTM D2992-06 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for "Fiberglass" (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
• 2001 ASTM D2992-01 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for "Fiberglass" (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
• 2001 ASTM D2992-96e1 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for "Fiberglass" (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings