Sectional Lining Specification - Brochure

Visit our website: www.npc.com451. ScopeThis specification describes the function of the NPC Internal Seal, its principle ofoperation, and the component materials that constitute the Internal Seal and theirphysical properties.2. Product ApplicationNPC Internal Joint Seals are designed to seal leaking pipe joints in most types of pipeincluding concrete, reinforced concrete, cast iron, ductile iron, steel, vitrified clay, PVCand HDPE. They are designed to withstand external head pressure of 34 feet (15 psi)and internal head pressure of 70 feet (30 psi).3. Principle of OperationNPC Internal Joint Seals stop leaking joints bybridging the joint with a flexible rubber seal andcompressing the rubber seal against the insidediameter of the pipe on either side of the joint withthe expansion bands.The compressive force providing the seal oneither side of the joint is the result of increasingthe effective diameter of the stainless steel expan-sion bands. The diameters of the expansion bandsare increased by tightening the bolts on theWedgeLock Assemblies. This forces the corre-sponding wedges, which are attached to theexpansion bands, away from each other increas-ing the expansion band diameter.Depending on the diameter of the pipe joint beingsealed, there will be between one and fourWedgeLock Assemblies on each expansion band to ensure an even distribution of compressiveforce on the rubber seal.Reference NPC Internal Seal RecommendedInstallation Procedure for a detailed explanationof the preparation, assembly and installation ofthe Internal Seal.INTERNAL JOINT SEALSTechnical SpecificationsCall today for more information: 800-626-2180464. MaterialsNPC Internal Joint Seals consist of a rubber seal, 304 stainless steel expansion bands,and WedgeLock assemblies.Flexible Rubber Seal - The rubber is made from a high-grade rubber compound.The rubber is extruded to the required length and the ends are hot spliced together usingvirgin rubber compound to form a high strength vulcanized joint. The physical properties ofthe rubber is listed in the table below.Stainless Steel Expansion Bands - The expansion bands are made fromeither 304 or 316 stainless steel. Physical properties are listed below.Physical Property 304 Stainless Steel 316 Stainless SteelTensile Strength (min.) 75,000 psi 75,000 psiYield Strength (min.) 30,000 psi 25,000 psiElongation in 2 inches (min.) 40% 40%INTERNAL JOINT SEALSTechnical SpecificationsPhysical Property ASTM Specification Test RequirementChemical Resistance D543, at 22°C for 48 hours1 N Sulfuric Acid No Weight Loss1 N Hydrochloric Acid No Weight LossTensile Strength D412 1200 psiElongation at Break N/A 350% minimumHardness D2240 (shore A durometer) +/- 5 from manufacturer’sspecified hardnessAccelerated Aging D573 70°C for 7 days Maximum Decrease15% tensile20% elongationWater Absorption D471, immerse 0.75 by 2 10% weight increaseinch specimen in distilled maximumwater at 70°C for 48 hoursOzone Resistance D1171 Rating 0Low Temp. Brittle Point D746 No fracture at -40°CTear Resistance D624, method B 200 lbf/in.ASTM C 923-02 Material Properties NPC Product Catalog Table of Contents Kor-N-Seal Flexible Connectors Kor-N-Seal Overview Kor-N-Seal Specifications Sizing Charts Kor-N-Seal 406 Series Kor-N-Seal 106 Series Kor-N-Seal 206 Series Recommended Maximum Sizes 306 Series Expansion Band Styles Pipe Chart - Outside Diameter Kor-N-Seal High Pressure Series Corrugated Pipe Adapter Kor-N-Seal Installation Instructions Nylon Plastic Wedge Korband Stainless Steel Wedge Korband Toggle Korband Slotted Korband 7" & 8" Wedge & Toggle Korband Multi-Connector Kor-N-Tee Connector Kor-N-Tee Saddle Connector Installation Tools & Accessories 206 Series 306 Series Manhole & Pipe Rehabilitation Seals Flexrib Frame-Chimney Seals Overview Technical Specifications Installation Procedure Manhole Measurement Worksheet Installation Tools Internal Joint Seals Overview Technical Specifications Installation Procedure Maximum Sealing Area External Seal Installation Procedure Extruded Rubber Specifications In-Plant Machniery & Diamond Drills Hydrokor VI Hydrokor V Hydrokor III Diamond Core Drills Diamond Core Drill Operating Procedure Steel Holeformers In-Plant Manhole Vacuum Tester Portable Field Coring Machines & Vacuum Testers Vertakor 1200 Portable Manhole Vacuum Tester Sealants, Wraps & Fibers Bidco C-56 Butyl Mastic Sealant Bidco Wrap Cadilloc External Pipe Joint Cadilloc External Sealing Bands Esky-Wrap Bidco Concrete Reinforcement Fiber