In the oil & gas non-metallic pipeline sector, the Russian market operates under a distinct technical specification framework. This article examines the ACPT-brand GRP pipe technical specifications (TU 2296-001-30372160-2016) issued by Tatneft-Presscomposite, analyzing requirements for glass-reinforced plastic line pipes, tubing, and casing, along with their alignment with international standards.
1. Product Scope & Applications
The specification covers ACPT (Advanced Composite Pipe Technology) polymer composite pipes — thermosetting plastic products based on epoxy resin systems cured by amine and anhydride hardeners, reinforced with fiberglass roving.
Downhole applications include:
- Injection wells for reservoir pressure maintenance
- Production wells with sucker-rod, ESP, or screw pumps
- Chemical waste disposal wells
- Observation wells
Surface pipeline applications:
- Oil-gathering lines for crude emulsions, gas-saturated oil, and condensate (including high H2S/CO2)
- High and low pressure water injection lines
- In-site pipelines
- Chemical transport lines (salts, acids, other chemicals)
2. Classification & Naming
Pipes are classified by purpose:
| Code | Type | Application |
|---|---|---|
| NK | Tubing | Downhole production |
| O | Casing | Well casing |
| L | Line Pipe | Surface pipelines |
Naming convention: ACPT_XXX_DyX_PyX_XXXX_X — encoding trademark, purpose, ID, pressure rating, thread type, connection type, hardener, and item number.
Example: ACPT_NK_Dy2.43"_Py10.3_2-7/8"M_AP — tubing, 2.43” ID, 10.3 MPa, 8RD threaded coupling, aromatic amine hardener.
3. Core Technical Requirements
Pipe ID ranges from 50 to 300 mm, length up to 9,420 mm.
The critical selection criterion is the three hardener system:
| Hardener Type | Max Temp | Max Pressure | Min Temp |
|---|---|---|---|
| Aromatic Amine | 100°C | 17.2 MPa | Media freezing point |
| Aliphatic Amine | 93°C | 27.6 MPa | Media freezing point |
| Anhydride | 65°C | 20.7 MPa | Media freezing point |
Connection types: 8RD tapered self-sealing thread (mandatory for tubing) and 2-4RD + O-ring mechanical connection.
4. Fittings System
Referenced specification SP 2296-002-30372160-2016 covers: elbows (90°–11.25°), equal and reducing tees, couplings, nipples, reducing fittings, and ANSI standard flanges.
5. International Standards Alignment
| TU 2296 Section | Reference Standard |
|---|---|
| Thread design | API Spec 5B (8RD) |
| Product design | API Spec 15HR |
| General requirements | GOST R 53201-2008 |
6. Key Takeaways
- Three hardener options cover 65°C–100°C, up to 27.6 MPa
- 8RD tapered thread is the mandatory tubing connection
- Structured nomenclature encodes all technical parameters in the part number
- Chemical media customization available per the operating manual
References: TU 2296-001-30372160-2016, GOST R 53201-2008, API Spec 15HR, API Spec 5B
Author: Simon Su | Composite Pipe Inspection | LEISA.COM | info@leisa.com