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D2105-01 – Standard Test Method Technical Guide
📐 Scope and General Requirements
This test method, designated D2105-01 (Reapproved 2019), covers the determination of the comparative longitudinal tensile properties of fiberglass pipe under defined conditions of pretreatment, temperature, and testing machine speed. Both Glass-Fiber-Reinforced Thermosetting-Resin Pipe (RTRP) and Glass-Fiber-Reinforced Polymer Mortar Pipe (RPMP) are classified as fiberglass pipes under this standard. The method is generally limited to pipe diameters of 6 in. (150 mm) or smaller, although larger sizes may be tested if the required apparatus is available. The values stated in inch-pound units are regarded as the standard.
⚠️ Safety Notice: As noted in Section 1.4, this standard does not purport to address all safety concerns. It is the responsibility of the user to establish appropriate safety, health, and environmental practices prior to use.
⚙️ Test Methodology and Key References
Execution of this test method relies on several complementary ASTM standards to ensure consistency and accuracy. Conditioning of specimens is performed according to Practice D618. Force verification of testing machines follows Practices E4, and the classification of extensometer systems adheres to Practice E83. For determining the physical dimensions of the pipe specimens, engineers must refer to Practice D3567. Terminology relating to the test is aligned with Terminology D883 and F412, while abbreviations follow Terminology D1600.
| 🟦 Parameter | 📏 Requirement / Reference |
|---|---|
| Standard Designation | D2105 −01 (Reapproved 2019) |
| Scope | Longitudinal Tensile Properties (Comparative) |
| Pipe Types Covered | RTRP and RPMP (Fiberglass) |
| Pipe Diameter Limit | 6 in. (150 mm) |
| Conditioning Standard | Practice D618 |
| Dimensional Standard | Practice D3567 |
💡 Technical Note: The standard is primarily intended for generating *comparative* data. It does not claim to provide absolute design values for the material, but rather allows for consistent comparison between different pipes or formulations under a defined set of test conditions.
📊 Key Terminology and Standard Definitions
A thorough understanding of the standard’s specific terminology is essential for correct application and interpretation of results. The standard provides clear definitions for the constituent layers and components of fiberglass pipe.
| 📐 Term | 🎯 Definition (per Standard) |
|---|---|
| Aggregate | A siliceous sand conforming to the requirements of Specification C33, except that the requirements for gradation shall not apply. |
| Exterior Surface Resin Layer | A resin layer applied to the exterior surface of the pipe structural wall, with or without filler or reinforcement, or both. |
| Fiberglass Pipe | A tubular product containing glass fiber reinforcement embedded in or surrounded by cured thermosetting resin. The composite may contain aggregate, fillers, pigments, liners, or other additives. |
| Liner | The inner portion of the wall at least 0.005 in. (0.13 mm) thick. It does not contribute to the strength in the determination of the hydrostatic design basis. |
🔴 Critical Distinction: The standard specifically defines the Liner as having a minimum thickness of 0.005 in. (0.13 mm) and explicitly states that it does not contribute to the structural strength for the hydrostatic design basis. This is a vital distinction when performing design calculations for RTRP and RPMP systems.
❓ Frequently Asked Questions
🔍 Is there an ISO equivalent to ASTM D2105?
No. Note 2 of the standard explicitly states: “There is no known ISO equivalent to this standard.”
💡 What is the maximum pipe diameter that can be tested using this method?
This test method is generally limited to pipe diameters of 6 in. (150 mm) or smaller. Larger sizes may be tested provided that the required apparatus is available.
⚡ Does the pipe liner contribute to the tensile strength measured in this test?
No. The standard defines the liner as the inner portion of the wall which does not contribute to the strength in the determination of the hydrostatic design basis.
📌 What types of pipes are specifically covered by this test?
The standard covers both Glass-Fiber-Reinforced Thermosetting-Resin Pipe (RTRP) and Glass-Fiber-Reinforced Polymer Mortar Pipe (RPMP). Both are categorized as “fiberglass” pipes for the purposes of this standard.