Yingnai FRP Sleeve provides corrosion-resistant protection, penetration and localized reinforcement for industrial piping systems. Its lightweight fiberglass construction can be used around carrier pipes, wall penetrations or repair areas without introducing metallic corrosion. Sleeve diameter, length, wall thickness, clearance, end configuration and resin system can be customized for installation and service requirements.
| Item | Typical Technical Specification |
| Product Name | FRP Pipe Sleeve |
| Primary Function | Pipe protection, wall penetration, casing, localized repair or engineered sleeve connection |
| Typical Manufacturing Range | DN50–DN4000 |
| Typical Sleeve Length | 300–2000 mm as a common fabricated range; longer sleeves can be produced |
| Service Classification | Nonpressure protective sleeve, penetration sleeve, repair sleeve or pressure-rated connecting sleeve |
| Dimension Symbols | Nominal size DN, sleeve ID, outside diameter OD, length L, wall thickness t and annular clearance C |
| Annular Clearance | Selected for pipe installation tolerance, thermal movement, spacers, grout or sealing system |
| End Configuration | Plain cut end, chamfered end, bell end, flanged end or laminated transition |
| Pressure Rating | Protective sleeves are normally nonpressure; connecting sleeves may be designed to PN6, PN10 or PN16 |
| Resin Options | Isophthalic polyester, vinyl ester, novolac vinyl ester or epoxy resin |
| Structural Reinforcement | Filament-wound or contact-molded glass reinforcement; local strengthening at penetrations or anchor rings |
| Optional Water-Stop Ring | Integral or bonded FRP puddle flange / water-stop ring for wall penetrations |
| Optional Spacers | FRP, polymer or elastomeric spacers for carrier-pipe centering and separation |
| Repair Configuration | Split sleeve, bonded sleeve or externally laminated reinforcement sleeve |
| Manufacturing Method | Filament winding, centrifugal casting, pultruded tube section or contact molding |
| Inspection | ID, OD, length, roundness, wall thickness, end squareness, fit-up clearance and laminate quality |
| Applicable Standards | ASTM D6041, ASTM C582, ASME NM.2 and the project penetration or repair specification |
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