API 15HR GRE Pipes | High-Pressure Glass Fiber Line Pipe DN40–900 – CNPS
High-Pressure Composite Line Pipe Engineered to API 15HR
DN40–DN900 line pipe rated 3.45–34.5 MPa — corrosion-resistant, lightweight and scale/wax-proof, with one-piece or coupling-connected joints built to API Spec 15HR-2016.
Product Overview
API 15HR GRE line pipe is high-pressure glass-fiber line pipe: glass-fiber roving as reinforcement wound in an epoxy-resin matrix. The design basis follows API Spec 15HR-2016 (High Pressure Glass Fiber Piping Specification) with reference to SY/T 6267-2006, and the production scope covers diameters from DN40 to DN900 at pressure ratings of 3.45 MPa to 34.5 MPa.
Two resin platforms are offered: acid anhydride GRE, for medium temperatures up to 65.5 °C, and amine epoxy GRE, for medium temperatures up to 93.3 °C. Both share documented physical properties — density 1.95 g/cm³, thermal conductivity 0.40 W/m·°C and Hazen-Williams C = 150 — keeping design data consistent across the line.
Beyond line pipe, the API 15HR family extends downhole: GRE tubing (DN40–DN100, 10–25 MPa), GRE casing (DN100–DN250, 10–25 MPa) and stratified water-injection tubing (1.6″–4″, 10–25 MPa). Products are not limited to listed sizes and can be designed and manufactured to customer requirements.
Why Choose API 15HR GRE Pipes?
- High-pressure water and CO₂/H₂S service corrodes and scales steel line pipe and tubulars
- Repeated well interventions to clear scale and wax raise operating cost
- Heavy steel strings complicate rig logistics and lift cost
- Downhole corrosion shortens string life in injection and production wells
CNPS Solution: A high-pressure GRE platform designed to API Spec 15HR-2016 — corrosion-resistant, lightweight, scale-proof and wax-proof line pipe, tubing, casing and injection strings — with one-piece or API 5B EUE threaded/coupling-connected joints.
- Pressure ratings from 3.45 MPa to 34.5 MPa across DN40–DN900
- Resin selection matched to temperature: acid anhydride ≤ 65.5 °C, amine epoxy ≤ 93.3 °C
- Corrosion resistance, light weight and long service life
- No easy scaling or waxing keeps flow stable and interventions down
- Full downhole range: tubing, casing and stratified injection strings
- Non-listed sizes designed and manufactured to customer requirements
- Line pipe: DN40 – DN900; 3.45 – 34.5 MPa
- GRE tubing (downhole): DN40 – DN100; 10 – 25 MPa
- GRE casing: DN100 – DN250; 10 – 25 MPa
- Stratified water-injection tubing: 1.6″ – 4″; 10 – 25 MPa
- Joints: one-piece joints standard; coupling connection (JG) where identified; API 5B EUE = external thickened long round threads per API 5B
- Resin systems: acid anhydride GRE (≤ 65.5 °C); amine epoxy GRE (≤ 93.3 °C)
- High-pressure design — Line pipe rated 3.45–34.5 MPa with a documented physical-property data set (density 1.95 g/cm³, C = 150).
- Corrosion resistance — Glass-fiber/epoxy construction resists corrosive media; light weight and long service life reduce operating cost.
- Scale- and wax-proof bore — Smooth internal surface keeps flow stable and cuts intervention frequency.
- Downhole range — GRE tubing, casing and stratified injection strings from DN40 to DN250 at 10–25 MPa.
- Temperature-matched resins — Acid anhydride GRE to 65.5 °C; amine epoxy GRE to 93.3 °C.
- Proven connections — One-piece joints with API 5B EUE threaded options and coupling connections where identified; high-strength wear threads for easy make-up and break-out.
- Custom scope — Products not limited to listed sizes; designed and manufactured per customer requirements.
Technical Specifications
| Item | Specification |
| Diameter / Size Range | DN40 – DN900 |
| Pressure Rating | 3.45 MPa – 34.5 MPa |
| Operating Temperature | Medium temperature ≤ 65.5 °C |
| Design Standard | API Spec 15HR-2016; SY/T 6267-2006 (per catalog 'Product Standards') |
⚙️Applications
- Oil, gas and water-mixture transport in petroleum and petrochemical areas
- Downhole GRE tubing: general water injection, sewage reinjection and polymer injection wells
- GRE casing: casing-damage well repair, water-source wells and CBM straight wells
- Stratified water injection: zonal injection wells and casing-protection single-layer injection wells
- Oilfield injection wells and production wells (CNPS API 15HR GRE tubing)
🔧Installation / Connection
- One-piece joints standard; coupling connection (JG) where identified
- API 5B EUE threaded connections (external thickened long round threads per API 5B) for easy make-up and break-out
- Stratified injection tubing features high-strength wear threads and is reusable across runs
- Light weight simplifies rig handling and reduces job cost for downhole runs
🎨Customization
- Sizes beyond the listed scope designed and manufactured to customer requirements
- Resin platform selected by medium temperature: acid anhydride or amine epoxy
- Joint type chosen per service: one-piece, coupling connection (JG) or API 5B EUE
- Tubing, casing and injection string configurations built to the well program
💎Why CNPS
- Solution engineering — we map your well or line service to the right GRE platform, resin and connection
- Full oilfield composite range — line pipe, tubing, casing and injection strings from one supplier
- Design-basis transparency — ratings presented against API Spec 15HR-2016 with documented physical data
- Custom scope — non-listed sizes and configurations designed to your requirements
Frequently Asked Questions
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