API 15S RTP Pipes | Spoolable Reinforced Plastic Line Pipe – CNPS
Spoolable Reinforced Plastic Line Pipe Engineered to API 15S
Continuous spoolable pipe DN17–200 mm at 2.5–32 MPa plus large-diameter DN250–500 mm — bonded-layer construction for impact, permeation and axial-strength performance.
Product Overview
API 15S is the specification for spoolable reinforced plastic line pipe, and it defines four reinforcement series: polyester, aramid, glass fiber and steel cord. Our API 15S RTP line covers continuous spoolable pipe from DN17 to DN200 mm at nominal pressures of 2.5–32 MPa, and large-diameter fixed-length pipe from DN250 to DN500 mm at 1.6–6.4 MPa.
The construction follows the classic RTP architecture: a liner layer that carries the media, a reinforcement layer wound over the liner that carries the pressure, and an outer protective layer that shields the structure from impact and damage. Bonded-type construction fuses the layers into an integral wall, improving impact resistance, gas-permeation resistance, ring stiffness and axial tensile performance, and preventing interlayer channeling on leakage.
Media temperature range is −40 °C to 90 °C. Acceptance testing follows documented criteria: short-term hydrostatic strength of 2 × nominal pressure for 1 h at 20 °C with no rupture or leak, and burst pressure ≥ 3 × nominal pressure at 20 °C. (Certification claims for API 15S in referenced materials belong to the referenced manufacturers and are not repeated here; confirm status with our engineers.)
Why Choose GRE Pipes?
- Welded steel flowlines are slow to install and leak at joints in remote or corrosive service
- Conventional coil pipe can lack the impact resistance and gas-barrier performance sour service demands
- High-sulfur and multiphase transport needs a pipe that resists permeation and interlayer channeling
CNPS Solution: Bonded-layer spoolable reinforced plastic line pipe engineered on API 15S — continuous coils to 32 MPa plus large-diameter pipe to 6.4 MPa, with metal crimped, flanged or reinforced-sleeve joint options.
- Four reinforcement series (polyester, aramid, glass fiber, steel cord) to match loading and cost
- Bonded construction: better impact resistance, permeation resistance, ring stiffness and axial tensile performance
- Coil supply for 1.8 in and below — transport-friendly, low logistics cost
- Documented acceptance criteria: 2× nominal hydrostatic (1 h, 20 °C), burst ≥ 3× nominal (20 °C)
- Joint options from metal crimped to non-metal reinforced sleeve for bonded pipes
- Media temperature −40 °C to 90 °C
- Spoolable continuous pipe: DN17 – 200 mm; 2.5 – 32 MPa
- Large-diameter fixed-length pipe: DN250 – 500 mm; 1.6 – 6.4 MPa
- Media temperature: −40 °C to 90 °C
- Reinforcement series: polyester, aramid, glass fiber, steel cord
- Structure: liner layer / wound reinforcement layer / outer protective layer
- Design basis: API 15S-2022 with GB/T 38725.2-2020, SY/T 6794-2018 and related standards (per reference materials)
- Four reinforcement series — Polyester, aramid, glass-fiber and steel-cord reinforcement to match pressure, cost and service conditions.
- Bonded-layer construction — Layers fused into an integral wall: better impact resistance, gas-permeation resistance, ring stiffness and axial tensile performance; no interlayer channeling on leakage.
- Coilable logistics — Continuous pipes of 1.8 in and below are coil-supplied, conforming to transport restrictions with low transport cost.
- Documented acceptance — Short-term hydrostatic strength 2 × nominal pressure for 1 h at 20 °C (no rupture/leak); burst ≥ 3 × nominal at 20 °C.
- Broad joint menu — Metal crimped joints (carbon steel anti-corrosion, 316L, duplex stainless, 825 nickel alloy, titanium) DN17–200 mm at 2.5–32 MPa; flanged joints DN17–500 mm at 1.6–25 MPa; non-metal reinforced sleeve joints DN50–500 mm at 1.6–6.4 MPa (bonded pipes).
- Service temperature — Media temperature −40 °C to 90 °C for continuous service.
- Hydrogen-ready line — A high-pressure hydrogen transport RTP has been developed for pure hydrogen and natural-gas hydrogen-blending transport, with a max design pressure of 10 MPa (per reference materials).
Technical Specifications
| Item | Specification |
| Material / Structure | Liner layer (polymer hot-melt extrusion); reinforcement layer (fiber or fiber-prepreg tape circumferentially wound); outer protective layer (polymer extrusion) |
| Diameter / Size Range | DN17–200 mm; nominal pressure 2.5–32 MPa |
| Pressure Rating | DN250–500 mm; 1.6–6.4 MPa |
| Operating Temperature | −40 °C to 90 °C |
| Standard Length | 1.8 in and below continuous pipes coil-supplied; coil size conforms to transport restrictions |
| Connection Type | Metal crimped: DN17–200 mm, 2.5–32 MPa (carbon steel anti-corrosion, 316L, duplex stainless, 825 nickel alloy, titanium); flanged: DN17–500 mm, 1.6–25 MPa; non-metal reinforced sleeve: DN50–500 mm, 1.6–6.4 MPa (bonded pipes) |
| Design Standard | API 15S-2022; GB/T 38725.2-2020; SY/T 6794-2018; SY/T 6662.2-2020; SY/T 6662.5-2014; Q/SY-TGRC 150-2019; SY/T 6769.5-2016; T/CPSI 01303-2023 (per reference materials) |
⚙️Applications
- Oil/gas field high-pressure water injection and single-well gathering lines
- Trunk and branch pipelines, sewage and brine transport
- Wear-resistant and hot-spring water pipelines
- High-sulfur gas fields and gas-oil multiphase transport (high-barrier gas transport pipe)
- Long-distance hydrogen transport and skid-equipment hydrogen delivery (max design pressure 10 MPa)
🔧Installation / Connection
- Continuous coils up to 1.8 in enable rapid lay-down with minimal field joints
- Metal crimped joints provide high-pressure make-up from 2.5 to 32 MPa
- Flanged joints for DN17–500 mm at 1.6–25 MPa tie into existing infrastructure
- Non-metal reinforced sleeve joints for bonded large-diameter pipe (DN50–500 mm, 1.6–6.4 MPa)
- Lightweight coils reduce transport and handling equipment requirements
🎨Project-Based Customization
- Reinforcement series selected per pressure class and loading: polyester, aramid, glass fiber or steel cord
- Joint type matched to service: metal crimped, flanged or non-metal reinforced sleeve
- Bonded or unbonded construction per permeation and mechanical requirements
- Hydrogen-service builds where required — confirm rating and standard compliance with our engineers
💎Why CNPS
- Solution engineering — API 15S RTP specified around pressure, media, route and jointing philosophy
- One system — pipe, crimped/flanged terminations and installation planning from one partner
- Trenchless-friendly logistics — coil planning integrated into project delivery
- Transparent standards — design basis and acceptance criteria documented for verification
Frequently Asked Questions
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