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If we can't tunnel through the Earth, how do we know what's at its center? A lady introduce her husband's name with saying by which can stop or move train what is that name.

Give points yo advocate thst biology is linked with physics chemistry mathsmatics geography. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.

Hottest Questions. Previously Viewed. Unanswered Questions. Wiki User A Keylock joint is a restrained joint, nylon rods keys slip into groove on the spigot and in the bell of pipe and restrain the pipe from pulling apart. The rods keys are removable. RTR Means Racing Throttle Response. Asked in Motorcycles What is rtr used in apachi? RTR J Madhu. RTR is not a technology.

Asked in Mechanical Engineering Lamination method of rtr pipe? FRP is a composite material consisting of a thermosetting polymer, often a type of polyester, reinforced with glass or other fibers. Glass fibers provide strength and stiffness to a composite material. Different types of resins are used for the manufacturing of RTRP pipes, which are selected according to the required properties like chemical resistance, temperature resistance and mechanical properties.

The properties of FRP pipes can be varied by changing the ratio of the raw materials. It provides continuity in both hoop and axial directions. It is generally preferred for field adjustments and repair work where no other joint systems can be used. This joint is also called butt and strap joint and it results in high strength and requires skilled labor.

GRP / GRE Pipe Products

Once the core pipe is laminated and tested successfully, jacket pipe cut to exact length to fit in the joint area is installed. This jacket pipe piece is laminated with the main jacket pipe by the same procedure. A nozzle is made on the jacket pipe to carry out the air test and subsequent injection of poly urethane foam. This type of joint is applicable for all the available pipe sizes. Asked in Apache Indians When Apache rtr will launch?

June Also will come next year. RTR can have many different meanings. I would really depend on the context that it is used in. Asked in Colors Which color suits Apache rtr cc?

Can't go wrong with red. Asked in Motorcycles What is the best two wheeler in cc?If we can't tunnel through the Earth, how do we know what's at its center? A lady introduce her husband's name with saying by which can stop or move train what is that name.

Give points yo advocate thst biology is linked with physics chemistry mathsmatics geography. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Mechanical Engineering. Wiki User FRP is a composite material consisting of a thermosetting polymer, often a type of polyester, reinforced with glass or other fibers.

Glass fibers provide strength and stiffness to a composite material. Different types of resins are used for the manufacturing of RTRP pipes, which are selected according to the required properties like chemical resistance, temperature resistance and mechanical properties. The properties of FRP pipes can be varied by changing the ratio of the raw materials. It provides continuity in both hoop and axial directions. It is generally preferred for field adjustments and repair work where no other joint systems can be used.

This joint is also called butt and strap joint and it results in high strength and requires skilled labor. Once the core pipe is laminated and tested successfully, jacket pipe cut to exact length to fit in the joint area is installed. This jacket pipe piece is laminated with the main jacket pipe by the same procedure. A nozzle is made on the jacket pipe to carry out the air test and subsequent injection of poly urethane foam.

This type of joint is applicable for all the available pipe sizes. Asked in Engineering What is key lock joint in rtr pipe?

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A Keylock joint is a restrained joint, nylon rods keys slip into groove on the spigot and in the bell of pipe and restrain the pipe from pulling apart. The rods keys are removable. RTR Means Racing Throttle Response. Asked in Motorcycles What is rtr used in apachi? RTR J Madhu. Asked in Plumbing What copper tube is available when using the grooved method of joining? Grooved method? Threads on the end of the pipe?

There is no tube or pipe in copper with threads. You can end a copper pipe with a connection that is threaded to accept steel pipe.

gre pipe lamination joint

RTR is not a technology. Asked in Websites What websites sell laminator pouches? A laminating pouch is a lamination-plastic sleeve that a sheet of paper or other thin object can be inserted in, to allow easy lamination using a home lamination machine. Amazon sells laminating pouches, as does a site called Lamination Depot.The purpose of this procedure is to set out the requirements and methods for Installation of GRP Pipeline including the lamination in detail.

This procedure shall be in compliance with the contract and technical specification implemented on the pipeline project. He shall be responsible for the overall Quality control of all the construction activities at site, and follows; — for managing all the necessary inspections, inclusive of witnessing, recording and reporting the results.

He shall be responsible for the overall safety of personnel materials and equipment during the construction and pre-commissioning of a Project, and follows; — Ensure all the operations at the site are conducted to the minimum safety standards, and that they are maintained throughout construction. Verifies compliance with health and safety regulations and ensures all necessary records are maintained and prepared according to established guidelines.

Acts as adviser to health and safety administration team regarding projects, tasks, and operations. Periodic visits to the job site throughout the duration of pipe installation to advise the contractor on the proper and applicable grp pipe handling, storage, laying, jointing and site testing procedures necessary to achieve a satisfactory pipe installation. Single pipes must be unloaded and handled separately one at a time. Use pliable straps, slings or ropes to lift single pipes.

Care shall be taken to prevent pipes from rolling or falling from flat bed trailer and this shall be attained by using proper supports. If at any time during handling or installation of the pipe, any damage such as cracks, de-lamination or fracture occurs, the pipe should be repaired before the section is installed. Contact grp pipe supplier for inspection of damage and for recommendation for repair method or the replacement.

The rubber gaskets received along with the pipes and fittings shall be stored in shelter with original packing until it is used at site. The gaskets must be protected from exposures to grease or oils, which are petroleum derivatives, and from solvents and other deleterious substances. Loading Pipes, fittings and prefabricated parts spools have to be transported by suitable trucks.

These trucks must have flat floors. Check for and remove any projections or nails etc. Materials must be secured for example by using wedges and wooden supports. These supports must have a minimum width of 10 cm, avoiding sharp edges. Usually the materials are tied in place, using pliable nylon or canvas slings. Chains or steel cables may not be used under any circumstances. The support distances must not exceed 2.Filament winding process is the method adopted for manufacturing GRE pipes.

In this process, supports are used for transporting glass fibres to the resin tray, in which the glass is impregnated by resin.

It is then followed by the application of impregnated glass on a rotating mandrel mould at a specified angle. This winding process is continues till the time required wall thickness is achieved. Post the process of pipe curing with oven, a mechanically procedure i.

After cutting the pipe to required length, its ends are machined to create a joint configuration. Advanced techniques like dual headed filament winding, hand layup and continuous filament winding process are used for manufacturing EPP pipes. Out of all the hi-tech procedures, advanced 2 axis and 4 axis CNC filament winding technology is implemented in GRP pipe.

Till the desired wall thickness is achieved, the winding process is continued in bi-directional layers. All the GRP pipes with filament winding is better than pipes manufactured with other methods like hand-layup, as they show better physical properties and have longer service life. Our pipes, fittings and liners are ID based and cover a wide range of applications and sizes. Thank you Your Enquiry has been sent successfully. Glassfibre reinforced plastic GRP or glassfibre reinforced epoxy GRE is the best when it comes to functional and durability aspect.

However, it is not so feasible for use in aesthetic and glamour way. Today, it is the most favorable material for any pipe manufacturer. One of the largest and single applications of polymer composites in the country is in the pipes, buried and above the ground. When it comes to glass reinforced epoxy GRE piping system, it is specially processed and designed for demanding conditions of offshore environment.

It has all the strength and durability to sustain highly corrosive fluids in all conditions of temperatures, pressures and adverse soil and weather conditions. The major applications are in desalination, oil exploration, fire mains, chemical plants, dredging, portable water and many more like this. Composite pipe have proven their competence in all the conditions including when the cost of the materials were increasing due to high crude oil and natural gas pricing.

In comparison to the industry of iron and concrete materials, the market of composite pipes is developing and gaining popularity. In offshore offshore production, platform and drilling rig, due to severe corrosion in most metal piping, there was increase in the cost manifold the original investment due to high maintenance part.

assembly laminated joint DN 200 PN 40 may 2016

For complete solution to offshore environment related problems, glass reinforced epoxy GRE piping system is introduced that can sustain even in highly corrosive fluids. With the ability to work under various temperatures, pressures and adverse soil and weather conditions, these pipes are used especially in desalination, chemical plants, oil exploration, dredging, fire mains, portable water and many more.

gre pipe lamination joint

Proved to be one of the best solutions in applications of petrochemical and marine industries, GRE pipes are treated for a maintenance free and light weight design with longer service life span. We have the capability to manufacture 30 KM GRE pipe per month taking into account average diameter of mm. I am interested. Industry Corrosive liquid transmission Chemical processing Desalination Fire water and fire protection.

Light weight : In comparison to other materials, GRE pipe have high strength-to-weight ratio.

Fittings & Joints

This enables for easy and quick installation of GRE pipes with handling modification and repairs.GRE pipe is manufactured by filament winding technique, providing great strength property to the pipe. GRE piping systems utilize epoxy or vinyl ester resins as corrosion barriers and fiberglass for their structural strength. Glass fiber reinforced plastic GRP or Glass fiber reinforced epoxy GRE are a composite material made of a polymer matrix reinforced with fibers.

GRE pipe is designed for corrosion resistance, weather resistance, visual inspection friendliness and durability. GRE pipe also has a smooth internal surface enables high pipe flow capacity and reduces friction as well. GRE pipe technology is based on the Filament Winding process using high strength fiberglass E-glass and amine cured epoxy resin as basic material.

Numerically controlled machines manufacture the product on a mandrel according to the cross section filament winding process. The continuous glass fibers are helically wound at predetermined angles and bonded with the epoxy resin. The mechanical resistant layer is composed of successive layers of pre-stressed glass roving impregnated with epoxy resin and orientated with a precise, predetermined angle selected in order to achieve the properties required.

GRE pipe is generally manufactured with an integral joint, which means that the socket for bonding, lock, or thread is produced simultaneously with the pipe body by winding on a specially designed metallic mold fixed at one end of the mandrel. The pipes are wound on precisely machined steel mandrels, the mandrel is extracted only when the pipe is cured. GRE pipe is resistant for corrosion both inside and outside, in wide range of fluid handling applications.

The pipe can be laid in any environmental conditions without any extra protection.

gre pipe lamination joint

GRE pipe has a smooth internal surface that reduces friction and enables a high pipe flow capacity. Low thermal conductivity of GRE pipes in comparison to steel only one percent of steel valuesminimizes the cost of insulation and the heat loss. Another major benefit of GRE pipes is that once installed they are virtually maintenance-free. GRE pipe has excellent strength to weight properties. When the ratio of strength per unit of weight is considered. GRE pipe surpass iron, carbon and stainless steel.

GRE pipe is easily jointed together by using many types of joining system such as integral bell-spigot end, butt joint kit lamination, grooved coupling and weld neck flange joint, FF type ASME B GRE pipe is easy to maintain because it does not rust and requires minimal protection from the environment.GRE pipe technology is based on the Discontinuous Filament Winding process using high strength fiberglass E-glass and amine cured epoxy resin as basic material.

Numerically controlled machines manufacture the product on a mandrel according to the cross section filament winding process. The continuous glass fibers are helically wound at predetermined angles and bonded with the epoxy resin. Lightweight and easy to handle and install GRE pipes have a smooth internal surface that reduces friction and enables a high pipe flow capacity.

Low thermal conductivity of GRE pipes in comparison to steel only one percent of steel valuesminimizes the cost of insulation and the heat loss. Another major benefit of GRE pipes is that once installed they are virtually maintenance-free. GRE pipes are well suited for environments where the corrosion resistance at competitive prices is required. GRE pipes offer a unique combination of high mechanical, thermal and chemical resistance which is obtained by the selection of high performance components and a proper design of the structure.

The inner liner, which is made by a resin rich layer reinforced with C-glass or synthetic veil, guarantees the pipe water tightness, its chemical and temperature resistance. The mechanical resistant layer is composed of successive layers of pre-stressed glass roving impregnated with epoxy resin and orientated with a precise, predetermined angle selected in order to achieve the properties required.

The resin and the hardener system are selected with the consideration of the combination of properties required from the finished product. The glass reinforcement in the form of continuous roving is chosen base on its compatibility with epoxy resin.

Glass tape or unidirectional reinforcements can be used to obtain local reinforcement. An external resin coating reinforced with a synthetic veil adds a finish to the pipe. Should weathering be a problem a UV inhibitor will be added to the coating. GRE pipes are generally manufactured with an integral joint, which means that the socket for bonding, lock, or thread is produced simultaneously with the pipe body by winding on a specially designed metallic mould fixed at one end of the mandrel.

The pipes are wound on precisely machined steel mandrels, the mandrel is extracted only when the pipe is cured. Standard lengths of 6m and 9m. UV Resistant - can be safely installed above-ground. Conductive pipe and fittings are available.

Fast, low cost assembly due to light weight and simple jointing techniques. Lighter support needed for above-ground systems. Why use GRE?Below are detailed health and safety procedures for GRP pipeline installation and lamination works.

The chemical components required for the butt-strap joints of GRP pipes present certain safety and health hazards if not handled well. Resin: Liquid resin contains styrene which is flammable. Its vapors may cause irritation of eyes, nose and throat.

Excessive inhalation may cause dizziness, drowsiness or loss of consciousness. Catalyst: Methyl ethyl ketone per oxide is a strong oxidizing agent and is a fire and explosion hazard.

It is irritant to eyes, skin and mucous membranes, and is known as sensitizer. Styrene: For tools cleaning The principal hazard is loss of consciousness in case of excessive inhalation of vapors.

Exposure to high vapor concentration may cause cardiac irregularities. Work in adequate ventilation. Long sleeved shirts, long pants and hats of some kinds depend on client safety requirement are recommended.

All materials and chemicals shall be away from heat source, sparks and open flames. Eyes: Flush exposed eye large amount of flowing water. In case of severity, immediately obtain medical aid from nearest hospital. The Sub-contractor safety officer and site management will meet the terms of Health and Safety regulations equally across all installation work activities.

All subcontractors employees to carry out a suitable and sufficient risk assessment of all risks to workers and any others who might be affected by their work activities.

This is for the purpose of identifying the measures he needs to take to comply with the requirements and prohibitions imposed upon him by or under relevant statutory provisions. In essence this is a requirement to wherever possible remove the risk entirely, or where this is not practicable reduce and control the risk to the lowest level that is reasonably practicable.

Listed below the hazardous materials used for jointing works notifying that the MSDS will be submitted for approval:.

The Resin, Styrene and Catalyst used in making the lamination joints are flammable and may be harmful. Styrene monomer vapor may cause irritation of the eyes, skin and mucous membranes of the upper respiratory tract.

Safety Procedures for GRP Pipeline Installation and Lamination

Excessive inhalation may cause loss of consciousness. Use with adequate ventilation. Avoid inhalation of vapors and preferably use respirators with filters chemical usage. Spilled resin should be absorbed with inert materials such as sand; Resin that may have been mixed with peroxide initiators prior to spillage should be mixed with inert filler and removed to an open area.

And allow time to gel and cure. Fight fire with foam, carbon dioxide, or dry chemical type extinguishers. Common Name: Styrene Hazard: Exposure to excessive styrene vapor concentrations may cause irritation of the eyes, skin and mucous membranes.

Direct contact with the liquid may cause blistering of the skin. Precautionary Measures: Use with adequate ventilation. Avoid contact with skin and excessive inhalation of vapors. To prevent eye and skin contact use Rubber gloves and safety glass for the technicians at work. Common Name: Catalyst The catalyst is an oxidizing agent and is a fire hazard.

It is an irritant to eyes, skin and mucous membranes and is known sensitizer. Avoid breathing vapor. Store in the original containers, in the smallest quantity, isolated from other chemicals and away from heat and open flames.