Yingnai frp desalination pipe is developed for seawater intake, pretreatment, process-water transfer and brine discharge in desalination plants. Its corrosion-resistant composite construction performs reliably in chloride-rich marine environments, while the smooth internal surface supports efficient hydraulic flow. Diameter, pressure class, resin system, fittings and joints can be customized for each desalination process stage.
| Item | Reference Specification |
| Product Name | FRP Process Piping / Glass-Fiber-Reinforced Thermosetting-Resin Piping |
| Nominal Diameter Range | DN10-DN4000 |
| Pressure Classes | PN 0.6, PN 1.0 and PN 1.6 MPa; availability varies by diameter |
| Standard Pipe Length | 1.8 m for selected small bore sizes, 6 m for selected medium sizes and 12 m for larger sizes |
| Dimension A | engineering definition to be confirmed against the product drawing |
| Resin Options | Isophthalic polyester, bisphenol-A vinyl ester, novolac vinyl ester, epoxy or project-specified thermoset resin |
| Laminate Construction | Resin-rich corrosion barrier, structural glass-reinforced laminate and external protective layer |
| Manufacturing Method | Filament winding for straight pipe; contact molding, filament winding or molding for fittings and custom components |
| Joint Options | Butt-and-wrap laminated joint, adhesive-bonded socket/spigot joint, flanged joint or elastomeric-sealed joint where designed |
| Design Pressure | Project-specific; pressure rating shall be qualified for the selected materials, dimensions, temperature, manufacturing process and joint system |
| Design Temperature | Project-specific and resin-dependent; state normal, maximum and upset temperatures |
| Operating Medium | Acids, alkalis, salts, wastewater, process water and other compatible corrosive fluids |
| Chemical Compatibility | Confirm resin, corrosion barrier and reinforcement using actual chemical composition, concentration, temperature and impurities |
| External Loads | Pipe weight, fluid weight, insulation, support reactions, wind, seismic, thermal expansion, occasional loads and vacuum where applicable |
| Support Design | Support spacing, saddle width, guides and anchors shall be calculated for the installed system rather than selected from diameter alone |
| Fittings | Elbows, tees, reducers, flanges, branch fittings, blind flanges, expansion components and custom spool pieces |
| Inspection and Testing | Material verification, visual inspection, dimensional inspection, laminate thickness, Barcol hardness, cure verification and hydrostatic/pressure testing as specified |
| Applicable References | ASME NM.2-2022; ASTM D2996-23; ASTM D2992-24; ASTM D5685-25; ASTM C581 where applicable |
| Required Inquiry Data | Medium, concentration, impurities, normal/maximum temperature, design/operating pressure, vacuum, flow rate, DN, joint type, installation layout, support conditions and applicable standard |
| Disclaimer | Final wall thickness and pressure rating shall be based on qualified product data and approved engineering calculations, not on this typical table alone |
| FRP Process Pipe Wall Thickness Matrix | |||||
| Nominal Diameter DN (mm) | Standard Length L (mm) | Dimension A (mm) | Wall Thickness at PN 0.6 MPa (mm) | Wall Thickness at PN 1.0 MPa (mm) | Wall Thickness at PN 1.6 MPa (mm) |
| 10 | 1800 | 1500 | 4.6 | 4.6 | 4.6 |
| 15 | 1800 | 1500 | 4.6 | 4.6 | 4.6 |
| 20 | 1800 | 1500 | 4.6 | 4.6 | 4.6 |
| 25 | 1800 | 1500 | 4.6 | 4.6 | 4.6 |
| 32 | 1800 | 1500 | 4.6 | 4.6 | 4.6 |
| 40 | 1800 | 1500 | 4.6 | 4.6 | 4.6 |
| 50 | 6000 | 2000 | 4.6 | 4.6 | 4.6 |
| 65 | 6000 | 2000 | 4.6 | 4.6 | 4.6 |
| 80 | 6000 | 2000 | 4.6 | 4.6 | 4.6 |
| 100 | 6000 | 2000 | 4.6 | 4.6 | 4.6 |
| 125 | 6000 | 3000 | 4.6 | 4.6 | 5.9 |
| 150 | 6000 | 3000 | 4.6 | 4.6 | 5.9 |
| 200 | 6000 | 3000 | 4.6 | 5.9 | 7.2 |
| 250 | 12000 | 4000 | 4.6 | 5.9 | 8.5 |
| 300 | 12000 | 4000 | 5.9 | 7.2 | 9.8 |
| 350 | 12000 | 4000 | 5.9 | 8.5 | 11.1 |
| 400 | 12000 | 4000 | 5.9 | 8.5 | 12.4 |
| 450 | 12000 | 4000 | 7.2 | 9.8 | 13.7 |
| 500 | 12000 | 4000 | 7.2 | 9.8 | 15 |
| 600 | 12000 | 6000 | 8.5 | 12.4 | 17.6 |
| 700 | 12000 | 6000 | 9.8 | 13.7 | 20.2 |
| 800 | 12000 | 6000 | 9.8 | 15 | 22.8 |
| 900 | 12000 | 6000 | 11.1 | 16.3 | 25.4 |
| 1000 | 12000 | 6000 | 12.4 | 17.3 | 28 |
| 1200 | 12000 | 6000 | 13.7 | ||
| 1400 | 12000 | 6000 | 16.3 | ||
| 1500 | 12000 | 6000 | 16.3 | ||
| 1600 | 12000 | 6000 | 17.6 | ||
| 1800 | 12000 | 6000 | 18.9 | ||
| 2000 | 12000 | 6000 | 21.5 | ||
| 2100 | 12000 | 6000 | 22.8 | ||
| 2200 | 12000 | 6000 | 24.1 | ||
| 2400 | 12000 | 6000 | 25.4 | ||
| 2600 | 12000 | 6000 | 26.7 | ||
| 3000 | 12000 | 6000 | 30.6 | ||
| 3300 | 12000 | 6000 | 33.2 | ||
| 3600 | 12000 | 6000 | 35.8 | ||
| 4000 | 12000 | 6000 | 39.7 | ||
| FRP Mortar Pipe | |
| Item | Reference Specification |
| Product Name | Reinforced Polymer Mortar Pipe (RPMP) / GRP Pipe |
| Diameter Range | DN300-DN3500 |
| Nominal Stiffness Classes | SN2500, SN3750, SN5000, SN7500 and SN10000 N/m² |
| Pressure Classes | PN 0.25, PN 0.6, PN 1.0 and PN 1.6 MPa; availability depends on stiffness class and diameter |
| Wall Construction | Inner surface/corrosion barrier, transition layer, structural layer containing polymer mortar, and external protective layer |
| Structural Materials | Thermosetting resin, glass-fiber reinforcement, graded silica/quartz aggregate and permitted fillers/additives |
| Resin Options | Unsaturated polyester or vinyl ester resin selected for the conveyed fluid and service temperature |
| Joint Options | Double-bell coupling with elastomeric gasket, sleeve coupling, flange, butt-and-wrap or project-specific restrained joint |
| Installation | Primarily buried installation; aboveground, jacking, sliplining or tunnel applications require specific design |
| Pipe Stiffness Selection | Select from burial depth, soil modulus, groundwater, traffic/live load, trench width, bedding, compaction and allowable deflection |
| Pressure Design | Internal pressure class shall be coordinated with long-term hydrostatic design basis, surge pressure and joint capability |
| Deflection Control | Allowable short- and long-term deflection shall be defined by the project specification and installation design |
| Bedding and Backfill | Granular bedding, embedment and compaction shall be selected for the pipe-soil system and local ground conditions |
| Operating Medium | Water supply, cooling water, sewage, stormwater, drainage and compatible industrial fluids |
| Inspection and Testing | Dimensions, wall thickness, stiffness, soundness, joint tightness, hydrostatic/pressure performance and chemical resistance as specified |
| Applicable References | ASTM D3262-25 for gravity sewer service; ASTM D3754-24 or ASTM D3517-24 for pressure applications; ASTM D3839-25 for buried installation; ISO 23856:2021 where specified |
| Required Inquiry Data | Medium, pressure, surge, temperature, DN, flow, stiffness class, burial depth, soil data, groundwater, traffic load, bedding/backfill, joint type and applicable standard |
| Reinforced Polymer Mortar Pipe Thickness Matrix | ||||||||||||||||||
| DN / Diameter (mm) | SN2500 | SN3750 | SN5000 | SN7500 | SN10000 | |||||||||||||
| PN 0.25 | PN 0.6 | PN 1.0 | PN 0.25 | PN 0.6 | PN 1.0 | PN 0.25 | PN 0.6 | PN 1.0 | PN 1.6 | PN 0.25 | PN 0.6 | PN 1.0 | PN 1.6 | PN 0.25 | PN 0.6 | PN 1.0 | PN 1.6 | |
| 300 | 5 | 5 | 5 | 5 | 5 | 5 | 5.4 | 5.3 | 5.3 | 6.1 | 6.1 | 6 | 5.8 | 6.7 | 6.7 | 6.5 | 6.3 | |
| 400 | 5.7 | 5.7 | 5.5 | 6.3 | 6.3 | 6.3 | 6.8 | 6.8 | 6.6 | 8 | 8 | 7.5 | 7.4 | 8.5 | 8.7 | 8.3 | 8.1 | |
| 500 | 6.9 | 6.7 | 6.6 | 7.7 | 7.7 | 7.5 | 8.5 | 8.4 | 8 | 9.7 | 9.5 | 9.1 | 8.8 | 10.7 | 10.5 | 10.1 | 9.8 | |
| 600 | 8.2 | 7.7 | 7.7 | 9.2 | 9.1 | 8.5 | 10.2 | 9.7 | 9.3 | 11.5 | 11.4 | 10.7 | 10.5 | 13 | 12.4 | 11.7 | 11.5 | |
| 700 | 9.5 | 8.8 | 8.6 | 10.8 | 10.3 | 10 | 12 | 11.3 | 10.7 | 13.6 | 13 | 12.4 | 11.9 | 15.2 | 14.5 | 13.5 | 13.1 | |
| 800 | 10.9 | 10.2 | 9.9 | 12.4 | 11.5 | 11 | 13.7 | 13.2 | 12.1 | 15.8 | 14.7 | 14 | 13.5 | 17.5 | 17 | 15.2 | 14.8 | |
| 900 | 12.2 | 11.4 | 10.8 | 14 | 12.9 | 12.3 | 15.5 | 14.4 | 13.5 | 17.9 | 16.9 | 15.6 | 15.1 | 19.8 | 18.6 | 17.1 | 16.6 | |
| 1000 | 13.5 | 12.4 | 11.9 | 15.6 | 14.2 | 13.5 | 17.3 | 16 | 14.9 | 20 | 18.5 | 17.3 | 16.5 | 22.2 | 21 | 18.8 | 18.2 | |
| 1200 | 16 | 14.7 | 14 | 18.5 | 16.8 | 16.2 | 21 | 19.1 | 17.8 | 23.7 | 22 | 20.3 | 19.7 | 26.3 | 23.6 | 22.4 | 21.6 | |
| 1400 | 18.2 | 17 | 16 | 21.5 | 19.6 | 18.5 | 24 | 22 | 20.3 | 27.4 | 25.4 | 23.4 | 22.6 | 30.5 | 27.5 | 26.4 | 25.2 | |
| 1600 | 21.3 | 19.2 | 18.3 | 24.1 | 22.2 | 21 | 27.6 | 24.8 | 23 | 22.4 | 31.3 | 29 | 26.6 | 25.8 | 34.6 | 31.2 | 29.8 | 28.4 |
| 1800 | 23.3 | 21.5 | 20.5 | 27.2 | 25 | 23.5 | 30.8 | 27.6 | 25.8 | 25.2 | 35 | 32.4 | 29.9 | 29 | 39 | 35 | 33.1 | 31.4 |
| 2000 | 25.9 | 24 | 22.5 | 30 | 27.5 | 26 | 34 | 30.5 | 28.5 | 27.7 | 38.7 | 36 | 33 | 31.8 | 43 | 38.6 | 36.6 | 34.8 |
| 2200 | 28.5 | 26.1 | 24.7 | 32.8 | 30 | 28.5 | 37 | 33.5 | 31.2 | 30.4 | 43 | 39.3 | 36.2 | 35 | 47.1 | 42.3 | 40.2 | 38.1 |
| 2400 | 31.1 | 28.4 | 26.8 | 36 | 32.8 | 30.9 | 40.3 | 36.4 | 34 | 33.2 | 46.2 | 42.8 | 39.2 | 38 | 51.5 | 46.2 | 44 | 41.5 |
| 2600 | 34 | 30.7 | 29 | 39 | 35.2 | 33.4 | 44 | 39.4 | 36.5 | 35.8 | 50.4 | 48 | 42.4 | 41.2 | 55.7 | 50 | 47.5 | 45.5 |
| 2800 | 38 | 34 | 32 | 43 | 39 | 37 | 49 | 44 | 41 | 40 | 55 | 50 | 47.5 | 46.5 | 62 | 57 | 53 | 52 |
| 3000 | 39 | 36 | 35 | 45 | 42 | 40 | 50 | 46 | 44 | 43 | 60 | 59 | 58 | 55 | 65.5 | 60.5 | 57 | 55 |
| 3200 | 42 | 39 | 38 | 50 | 50 | 42.5 | 55 | 50 | 48 | 47 | 61 | 58 | 57 | 56 | 67 | 64 | 63 | 61 |
| 3400 | 52 | 49 | 47 | 57 | 52 | 50 | 63 | 58 | 54 | 53 | 67 | 62 | 59 | 57 | 73 | 68 | 64 | 62 |
| 3500 | 53 | 50 | 48 | 58 | 53 | 49 | 64 | 59 | 55 | 54 | 69 | 63.5 | 60 | 59 | 75 | 70 | 62.5 | 61 |
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