GB/T 32491-2016 in English
VALIDTest method for long-term hydrostatic pressure of glass fiber reinforced thermosetting resin pipe and fittings
- Issued on:2016-02-24
- Implemented on:2017-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
| Standard No: | GB/T 32491-2016 |
| Document status: | VALID |
| Title in English: | Test method for long-term hydrostatic pressure of glass fiber reinforced thermosetting resin pipe and fittings |
| Title in Chinese: | 玻璃纤维增强热固性树脂管及管件长期静水压试验方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-02-24 |
| Implemented on: | 2017-01-01 |
| ICS Classification: | 83.120-Reinforced plastics |
| Professional Classification: | GB-National Standard |
| Related Keywords: | long-term hydrostatic test method
long-term hydrostatic pressure long-term hydrostatic test method terms definition application scenario long-term long-term hydrostatic strength test method |
| Related Topics: | thermosetting resin
Thermosetting resin+ Yang bed resin long term Glass static pressure test still water hydrostatic pressure resin tube GBT32491 GB/T 32491-2016 Resin Pressure Test |
《GB/T 32491-2016玻璃纤维增强热固性树脂管及管件长期静水压试验方法》由TC39（全国纤维增强塑料标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
GB/T 32491-2016 Standard Overview
Glass fiber reinforced thermosetting resin pipe and fittings long-term hydrostatic test method is a key standard for evaluating the strength and durability of pipeline materials under long-term hydrostatic pressure. This standard is applicable to thin-walled glass fiber reinforced thermosetting resin pipes and fittings, and specifies the terminology, principles, conditions and equipment of the test.
Key term explanation
1. Free end seal and constrained end seal
Free end seal allows the specimen to generate axial stress under the action of internal pressure, while constrained end seal limits the axial thrust through a rod or external structure and only generates hoop stress. The choice of these two sealing methods directly affects the accuracy of the test results.
Long-term hydrostatic test method
| Terms | Definition | Application scenario |
|---|---|---|
| Long-term hydrostatic strength (LTHS) | The hoop tensile strength value of the material within a specified time. | Evaluate the durability and safety of the pipeline. |
| Hydrostatic design basis (HDB) | The hoop stress value extrapolated to 50 years later. | Determine the design pressure and safety factor of the pipeline. |
| Application design factor | The safety factor considering installation, environment and other factors, usually less than or equal to 1.00. | Optimize the reliability and economy of pipeline design. |
Test steps and data analysis
The test uses linear regression analysis to calculate the long-term hydrostatic strength and pressure benchmark based on the relationship between the logarithm of stress or pressure and the logarithm of failure time. The following are the key steps:
1. Apply different internal pressures to the specimens and record the failure time.
2. Analyze the data correlation coefficient (r) to ensure that the requirements of Table A.1 are met.
3. Calculate the regression line and prediction interval to determine the HDB or PDB.
Comparison of standard frameworks
| Dimensions | GB/T 32491-2016 | Comparison of relevant standards |
|---|---|---|
| Test conditions | Water is used as the medium, and the temperature is controlled at ±3℃. | Other standards may use different media or temperature ranges. |
| Failure determination | Liquid flowing out of the pipe or leaking over a certain distance is considered a failure. | Some standards have slight differences in the definition of leakage. |
| Data processing | Based on linear regression analysis, calculate the correlation coefficient r and prediction interval. | Other methods may use nonlinear models or statistical tool differences. |
Implementation suggestions
Material selection and manufacturing:Select materials and processes that meet standard requirements to ensure uniformity of pipe geometry.
Equipment calibration:Test equipment must accurately control pressure within ±1% and be calibrated regularly.
Data recording:Record sample information, failure time and form in detail to ensure the accuracy of data analysis.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 40396-2021 in English
Test method for glass transition temperature of polymer matrix composites—Dynamic mechanical analysis（DMA）
2021-08-20 -
GB/T 41488-2022 in English
Plastics—Prepregs—Definitions of terms and symbols for designations
2022-04-15 -
GB/T 32788.1-2016 in English
Test method for properties of prepreg―Part 1:Determination of gel time
2016-06-14
