GB/T 39096-2020 in English
VALIDPetroleum and natural gas industries—Aluminium alloy pipe for use as tubing for wells
- Issued on:2020-09-29
- Implemented on:2021-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 39096-2020石油天然气工业 油气井油管用铝合金管》由TC355（全国石油天然气标准化技术委员会）归口，TC355SC9（全国石油天然气标准化技术委员会石油专用管材分会）执行，主管部门为国家标准化管理委员会。
Introduction
Interpretation of the core content of the standard
This standard specifies the technical requirements for aluminum alloy oil pipes in the petroleum and natural gas industry, with key points:
| Technical Dimensions | Group I | Group II | Group III | Group IV |
|---|---|---|---|---|
| Minimum Yield Strength (MPa) | 325 | 480 | 340 | 350 |
| Maximum Operating Temperature (℃) | 160 | 120 | 220 | 160 |
| Corrosion rate (mm/a) | - | - | ≤0.25 |
Key technical requirements
1. Material performance classification
The standard divides aluminum alloy oil pipes into 4 groups: Group II has the highest room temperature strength (480MPa), Group III has the best high temperature resistance (220℃), and Group IV requires a corrosion rate of ≤0.25mm/a in 3.5%NaCl solution.
2. Dimension tolerance control
The outer diameter tolerance of the tube is ±1%, and the wall thickness tolerance is ±0.8~0.9mm. Special requirements include:
- Straightness deviation ≤ 0.2% of pipe length
- Drift gauge diameter is 3.2mm smaller than the nominal inner diameter
- Tolerance of thickened end wall thickness ±10%
Implementation points
Corrosion test specifications
ASTM G44 standard test must be carried out for Group IV materials:
- Specimen thickness ≥ 2mm
- Test solution volume ≥ 20cm³/cm²
- Test period ≥ 72h
- Corrosion rate is calculated according to Vk=(m1-m2)/(ρ×S×tt)
Purchase and acceptance process
The order must specify 7 mandatory parameters + 5 optional parameters. The manufacturer should keep the following:
- Heat treatment records
- Chemical composition analysis
- Mechanical properties test report
- Traceability records for more than 3 years
Technology evolution analysis
This standard is modified to adopt ISO 13085:2014. The main technical differences include:
- Add the corresponding relationship of my country's alloy system
- Change the unit of corrosion rate to mm/a
- Adjust the hydrostatic pressure test factor to 0.5
- Supplement the requirement of specimen thickness ≥ 2mm
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