Nonmetallic line pipe selection starts with the service envelope, not with a catalogue brand. Operators, EPC and procurement teams comparing non metallic pipes for gathering, water, injection or offshore flowlines need a clear route across four product families: API 15S reinforced thermoplastic pipe (RTP), API 17J unbonded flexible pipe, API 15HR high-pressure fiberglass, and API 15LR low-pressure fiberglass. This pillar is a router — one paragraph per standard, decision inputs, a selection matrix and an RFQ starter — not a rewrite of the owner posts linked below.
CNPS supplies API 15S certified RTP, API 17J certified flexible pipe, and API 15HR and API 15LR certified fiberglass pipe. That names the families this guide routes. It does not invent certificate numbers, monogram details or scope limits. You may request certificate copies with the quotation. For the broader composite landing page, see Specify the service. Then select the composite system. Fiberglass-only browsing stays on Fiberglass Pipe Systems: FRP, GRP and GRE.
Answer first: four standards, four product families
Nonmetallic pipe in oil and gas is not one material class. Four API product frameworks cover most line-pipe RFQs this site supports:
- API 15S — spoolable reinforced thermoplastic line pipe (RTP). Money CTA: Reinforced Thermoplastic Pipe (RTP).
- API 17J — unbonded flexible pipe for offshore and dynamic service. No CNPS product page exists; selection and RFQ live on the Oct 14 guide linked below. Do not invent a 17J PDP.
- API 15HR — high-pressure fiberglass (GRE/FRP) line pipe. Money CTAs: High-Pressure Fiberglass Line Pipe and the combined pipeline page API 15HR And API 15LR FRP Pipeline.
- API 15LR — low-pressure fiberglass line pipe and fittings. Same combined pipeline PDP as above; LR-specific ordering lives on the Oct 22 owner post.
Boundary only: API 15LE PE lining is not a fourth “line pipe family” in the same sense — when PE lining fits gathering service, use API 15LE HDPE Lining Tubes: When PE Line Pipe Fits Oilfield Gathering Service. This pillar does not expand 15LE selection.
Decision inputs: pressure, temperature, medium, location and install
Before you open a datasheet, lock the inputs that decide which standard can even compete. Thermoplastic materials for gas industry gathering, produced water, injection and multiphase lines all fail different ways when these are fuzzy:
- Pressure — normal, design, surge, vacuum and any cyclic envelope. Compare only size-specific, qualified pressure-temperature pairs — never a headline maximum alone.
- Temperature — fluid, ambient, storage and installation minima/maxima; ask for the qualified P–T relationship for the exact product.
- Medium — composition, water cut, gas, H2S/CO2, solids, cleaning chemicals, permeation and decompression sensitivity.
- Onshore vs offshore — static buried or aboveground routes vs dynamic risers, hang-offs and vessel motion (17J territory when unbonded flexible is in scope).
- Static vs dynamic — fatigue, curvature, tension and bend-radius limits change the product family even when pressure looks similar.
- Installation method — reeled/spoolable pull, stick joint make-up, trenchless, pull-in, or offshore lay; tooling and trained crews travel with the offer.
If the job is “when does RTP fit gathering,” that RFQ list belongs to RTP Pipe Selection: When Reinforced Thermoplastic Pipe Fits Gathering Service (RFQ Fields) — this pillar only routes you there.
API 15S RTP: spoolable thermoplastic line pipe
API 15S covers spoolable reinforced plastic line pipe. On the live RTP product page, construction is a thermoplastic liner, load-bearing reinforcement and outer cover; capability depends on the exact liner, reinforcement, cover, end fittings, size and qualification — “RTP” alone does not prove a pressure, temperature, chemical-compatibility or API rating. The live PDP does not publish DN/MPa/°C tables; do not invent them from stale database copy. Ask for configuration-specific envelopes with the quotation.
How to read what the standard covers and what a certificate proves is owned by API 15S RTP: What the Spec Covers, What a Certificate Proves, and How to Ask for It in an RFQ. End fittings (flanged or hubbed steel terminations on the CNPS catalogue) are owned by the RTP end-fittings guide linked in the fittings section below. Pipe-body liner/reinforcement/jacket reading belongs to the Oct 21 specifications post — not restated here. CNPS supplies API 15S certified RTP; request certificate copies in the RFQ if required.
API 17J unbonded flexible pipe: offshore and dynamic service
API 17J is the unbonded flexible-pipe framework used when offshore flowlines, risers or other dynamic service need a qualified flexible product. CNPS publishes no product numbers, DN/MPa/°C windows or 17J PDP on www.cnps.com. Do not invent a flexible-pipe product page or catalogue ratings for this family.
Selection, fit/out-of-scope and RFQ fields for unbonded flexible pipe are owned entirely by API 17J Flexible Pipe: When Unbonded Flexible Pipe Fits Offshore Flowlines (Selection & RFQ Fields). Spoolable thermoplastic vs other spoolable options (including a 17J boundary row) lives on the Oct 18 RTP vs TCP refresh — this pillar only points, and does not deep-dive that comparison. CTA for 17J work: that Oct 14 post, then Talk to an Engineer / RFQ (linked at the end of this guide) — never a fake 17J PDP. CNPS supplies API 17J certified flexible pipe as a standing product-family statement; still no numbers, monograms or scope limits here.
API 15HR high-pressure fiberglass line pipe
API 15HR is the high-pressure fiberglass line-pipe path for GRE/FRP systems when the service envelope and joint package call for HR qualification. Live High-Pressure Fiberglass Line Pipe (PDP 9411, linked above) states diameter DN40–DN900, pressure 3.45–34.5 MPa, and temperature resistance up to 110 °C, citing API Spec 15HR-2016 on the page. Live API 15HR And API 15LR FRP Pipeline (PDP 710, linked above) states DN40–DN600, 3.45–34.5 MPa, and API-rate 93–110 °C as worded. Quote each PDP’s window as published — do not merge them into one invented range.
How to read an API 15HR claim and the evidence to request is owned by API 15HR Fiberglass Line Pipe Standard: Reading an API 15HR Claim and the Evidence to Request. When HR GRE fits (service envelope, DN, joints, RFQ) is owned by High-Pressure Fiberglass Line Pipe Selection: When API 15HR GRE Fits (Service Envelope, DN, Joints, RFQ). Material-property design data stays on the Oct 26 GRE properties post — one sentence of awareness here only. CNPS supplies API 15HR certified fiberglass pipe; certificate copies are RFQ-declared.
API 15LR low-pressure fiberglass line pipe
API 15LR covers low-pressure fiberglass pipe and fittings. On the live combined pipeline PDP, LR language points at low-pressure systems such as geothermal wells and water transport; the published diameter/pressure/temperature block on that page is shared with the HR/LR product family as worded above (DN40–DN600, 3.45–34.5 MPa, 93–110 °C). Do not invent a separate LR-only numeric table that the live page does not publish.
Where 15LR fits, ordering fields and inspection witness points are owned by API 15LR Low-Pressure Fiberglass Pipe and Fittings: Where 15LR Fits, Ordering Fields and Inspection Witness Points. Choosing high-pressure vs low-pressure fiberglass (without rewriting either owner) is owned by API 15HR vs API 15LR: How to Choose High-Pressure vs Low-Pressure Fiberglass (GRE/FRP) Line Pipe and Tubing. CNPS supplies API 15LR certified fiberglass pipe; no monogram or scope invention.
Fittings and terminations across all four families
Fittings are family-specific. Do not copy an FRP elbow RFQ onto an RTP reel, or assume a 17J end fitting from a fiberglass flange sheet.
- FRP/GRE fittings taxonomy (elbows, tees, reducers, couplings matched to the pipe system) — FRP and GRE Pipe Fittings: Elbows, Tees, Reducers and Couplings Matched to the Pipe System.
- FRP/GRE flanges to steel valves — FRP / GRE Flange Selection: Matching Fiberglass Flanges to Steel Valves, API 15HR/15LR Pipe and Your RFQ.
- RTP steel end fittings (flanged or hubbed) — RTP End Fittings and Terminations: Flanged vs Hubbed Steel End Fittings and What to Qualify.
- API 17J terminations — one boundary only: ask on the Oct 14 17J RFQ; no CNPS 17J end-fitting product claim on this site.
Qualify pipe and fittings as one pressure-containing package for the standard you selected. This pillar does not invent fitting ratings, ASME class, bolt patterns or seal types.
Selection matrix, RFQ starter and FAQ
Use this matrix as a router — then open the owner post or PDP for the family that survives the inputs. Cells are qualitative gates, not datasheet substitutes.
| Decision gate | API 15S RTP | API 17J flexible | API 15HR fiberglass | API 15LR fiberglass |
|---|---|---|---|---|
| Typical duty cue | Onshore spoolable gathering / water / injection when RTP is qualified | Offshore / dynamic unbonded flexible when 17J is in scope | High-pressure GRE/FRP line pipe when HR envelope fits | Low-pressure GRE/FRP / geothermal / water when LR fits |
| Live CNPS numeric window | None on live PDP 745 — ask configuration-specific P–T | None — no CNPS 17J PDP | 9411: DN40–DN900, 3.45–34.5 MPa, up to 110 °C | Use 710 wording with LR owner post; no invented LR-only table |
| Primary owner posts | Oct 12 selection · Oct 19 standard · Oct 27 end fittings | Oct 14 selection/RFQ only | Oct 20 standard · Oct 23 selection | Oct 22 owner · 11906 HR vs LR |
| www money CTA | PDP 745 once | Oct 14 + Talk to an Engineer / RFQ | PDP 9411 once · PDP 710 once (router) | PDP 710 once (shared) |
RFQ starter — send the same fields to every shortlisted family so offers stay comparable:
| RFQ field | What to declare |
|---|---|
| Service tag / route | Gathering, water, injection, geothermal, offshore flowline/riser — buyer-declared |
| Standard family | 15S / 17J / 15HR / 15LR (or 15LE lining boundary) — one primary per string |
| P–T–medium | Normal/design/surge; min/max temperatures; composition and cycling |
| Size and length | DN / ID, spool or stick lengths, bend radius / joint count expectations |
| Location and install | Onshore/offshore; static/dynamic; reeled vs stick; pull/lay constraints |
| Fittings / terminations | Family-matched: RTP flanged/hubbed; FRP fittings/flanges; 17J per Oct 14 questions |
| Documents | Datasheet, qualification basis, install/test procedures, certificate copies if required |
Next step: pick the surviving family, open its owner post, then request a comparable quotation via Talk to an Engineer (17J) or the PDP CTAs above (15S / 15HR / 15LR).
What is nonmetallic line pipe selection in this guide?
It is a router across API 15S RTP, API 17J unbonded flexible, API 15HR and API 15LR fiberglass using pressure, temperature, medium, location and installation inputs — then a handoff to the owner post or PDP for that family.
Why is there no API 17J product page?
www.cnps.com has no published 17J PDP. Selection and RFQ for unbonded flexible pipe stay on the Oct 14 guide; CTA is that post plus Talk to an Engineer / RFQ. This pillar invents neither ratings nor a product URL.
Can I compare families with one maximum pressure number?
No. Live RTP PDP 745 states that product capability depends on liner, reinforcement, cover, end fittings, size and qualification. Fiberglass windows on 9411 and 710 are size- and product-specific as published. Always ask for the qualified pressure-temperature relationship for the exact configuration.
Where do fittings belong in the RFQ?
With the same family as the pipe. FRP/GRE fittings and flanges have their own Oct 24/25 guides; RTP steel end fittings have Oct 27; 17J terminations are questions on Oct 14 only.
What about API 15LE HDPE lining?
One boundary: when PE lining fits oilfield gathering, use the Sep 26 HDPE lining selection post linked above. It is not expanded as a fifth deep-dive in this pillar.
What are common uses of nonmetallics in the oil and gas industry on this route?
Gathering and flowlines, water and injection lines, geothermal/water on LR fiberglass, high-pressure GRE on HR, spoolable RTP where qualified, and offshore unbonded flexible where 17J applies — gated by medium and P–T.
