For onshore projects, an isolation joint is used to limit the spread and hence cost of cathodic protection current to those pipes that need to be effectively and economically protected by. They are a jointventure company with manufacturing and. They have the facilities to manufacture any size joint from. Our product range is extensive, as you will see in this website, and our services include a wide variety of cathodic protection engineering and installation offerings.
As the name implies, a monolithic isolation joint appears as a solid block. It is the essential pressure component necessary for steel pipeline cathodic protection system, broadly applicable to steel pipeline cathodic protection systems. Introduction the monolithic isolation joint mij can be the most robust isolation and sealing solution in a pipeline. Monolithic insulation joint is a boltless structure that provides electrical resistance between the pipeline sections and adjoining structures, thus improving the effectiveness of the cathodic protection system cp systems. The electrostop monolithic isolation joints are a leakproof, maintenancefree and long lasting block against the flow of electric current in all piping systems. Isolation joint material is typically asphaltimpregnated fiberboard, although plastic, cork, rubber, and neoprene are also available. Monolithic isolating joints do not require maintenance, they improve the cathodic protection of gas, water and petroleum pipelines. Monolithic isolation joint specification our monolithic isolation joints are manufactured at the alfa engineering facility an iso. Monolithic insulating joints are used for the sectioning of main pipelines and service pipelines to ensure adequate cathodic protection and electrical safety.
The electrostop eliminates short circuits and field assembly. Where you find pipelines for gas an oil distribution system, you will also find a range of alfa engineering isolation joints. An insulation joint is a boltless structure that provides electrical resistance between the pipeline sections and adjoining structures, thus improving the effectiveness of the catholic protection system cp systems. The annuls between monolithic isolation joint and clamp is filled with an epoxy grout and internal non conductive liner is provided for electrical isolation. Monolithic insulation joints are welded prefabricated 3 piece unions that are for pipeline electrical sectioning. Arcing can damage and short out the joint, or in the event of a leak at the joint, a combustible atmosphere may be present and may be ignited by the arc assuming the pipeline is carrying a flammable material. Monolithic insulating joint provides electrical insulation to the pipeline and prevents electrochemical reactions thus saving from corrosion.
The clamp for each monolithic isolation joint is designed and manufactured with actual site dimensions. Monolithic isolation joints and flange pipe connection gpt. They electrically insulate 2 sections of pipeline for transportation of hydrocarbon, gas or water. In defense of the monolithic isolation joint onepetro. Insulated joints in pipelines may be subject to overvoltage failure.
Refer to aci 223r for guidance on isolation joints for slabs using. Monolithic isolation joints provide electrical isolation between segments of linepipe. Insulating flange kits versus monolithic isolating joints. Monolitic isolation fitting specification monolithic isolation fittings shall be boltless and completely factory assembled in accordance with the appropriate requirements ofastm, api, din and bs codes. Provide an isolation joint between the foundation wall and slab floor where vertical movement is expected. Corrosion destroys approximately 20% of the worlds annual production of steel. The monolithic insulating joint was developed as an alternative to insulating flange kits.
Scope this part of ipsmtp750 covers the minimum requirements for the design, fabrication and inspection of monolithic insulating joints, for electrical isolation of pipelines from plants andor other. Established in 1981 from the business idea of two brothers thanks to their passion for mechanics, meccanica segrino can be considered a worldwide leading manufacturer of monolithic insulating joints for gas, water and other fluids insulation joints provide electrical isolation and cathodic protection in pipeline, tanks and pumping station where petroleum, gas and water are carrier fluid. Monolithic insulating joint by goodrich gasket pvt ltd is a welded prefabricated 3piece union applicable for pipeline electrical sectioning and commonly used when the cathodic protection is present to prevent any interference in corrosion control. They are most commonly used when the cathodic protection is present to prevent any interference with corrosion control. The dielectric isolation material is made of a thermosetting fiberglass epoxy material. Introduction alfa engineering monolithic isolation joints. Bvm engineers manufacturer of quick opening closure. These joints are monoblock, they cannot be dismantled and they do not require any. The advantages of using the monolithic isolation joint is that this kind of joint avoids small parts such as gaskets and flanges, and can be produced to exacting standards of precision.
Isolation joints joints that isolate the slab from a wall, column or drainpipe. The usage of monolithic isolating devices in cathodically protected systems is considered by nace sp02862007. Unfortunately the use of these accessories has been difficult to carry out in discharge lines of wells with high pressure and temperature and sour service conditions, mainly because the materials of the seal and dielectric isolation systems can suffer damages associated with the. Overvoltage protection of insulated joints in pipelines. Import data and price of monolithic isolation joints zauba. Select a product acrms current rating that is above the expected site value. Flange isolation and monolithic isolating joints nace by. Monolithic isolation joints mijs are one type of isolating device. The monolithic isolation joint is a sealed system, which obscures the individual components inside. The most uptodate, patented joint on the market, isojoint does not depend on the use of isolating sleeves and washers. Electrostop monolithic isolation joints gpt industries. Monolithic insulating joints production meccanica segrino. Gpt engineers and manufactures high quality prefabricated isolating flanges and maintenance free monolithic isolation joints to block the flow of current. They provide current spreading on cathodic protection systems.
Alfa monolithic isolation joints are boltless and completely factory assembled in accordance with the appropriate requirements of astm, api, din and bs codes. However, the monolithic isolation joint can also be the weak link in a piping system if the proper steps are not taken in the selection, verification and qualification processes. Polarization probe for over 20 years, as the top pipefitting manufacturer in china which access to the eu ce certification and. Braun stahl pipe tec insulation joints type isg, type iml and type isn are monobloc or monolithic insulation joint. Many cp professionals often wonder about the pros and cons of using insulating flange kits over monolithic isolation joints. The material of flange is compatible with monolithic isolation joint. Overvoltage protection of insulated joints in pipelines dairyland. Import data and price of monolithic insulation joints. Joints in concrete construction types and location of. Gpts new electrojoint monolithic isolation joint mij is a maintenancefree alternative to flanged pipeline connections appropriately sized and priced for gas distribution lines.
Established in 1956, farwest corrosion control company is a worldclass leader in cathodic protection and corrosion control related products, solutions and services. View detailed import data, price, monthly trends, major importing countries, major ports of monolithic insulation joints under hs code 73079990. Api 6fb rated the monolithic isolation joint 290f or 8c cause of pipeline failures lets avoid these situations and use smarter pipeline connections lack of skilled people in the trade gre gasket kit assembly gylonr gaskets causes of flange failures questions. Isolation joints are formed by placing preformed joint material next to the column or wall or standpipe prior to pouring the slab. Industry standards, regulations and related publications. Monolithic insulting joint goodrich gasket industrial. After the slab has cured for several days, seal the joint by pouring polyurethane or similar caulk into the 12inch channel formed with a removable strip. When you bury the electrostoptm isolation fitting you bury maintenance costs forever an especially important feature. It can seem a simple piece of equipment because it has no moving parts and is supplied fully assembled and ready to weld into the pipeline. Isolating joint failure for cathodic protection materials performance. Standardized and specialized designs are available, following some features. The electrostoptm monolithic isolation fittings will serve as a positive leak proof, long lasting block against the flow of electric current in all piping systems. A contraction joint is formed, sawed, or tooled groove in a concrete structure to create a weakened plane to regulate the location of cracking resulting from the dimensional change of different parts of the structure.
Vkvc monolithic insulating joints ij insulating joints are used on pipelines to provide electrical isolation to prevent corrosion. Isolation joints in pipelines may be subject to overvoltage failure due to lightning. Ijas ltd the main supplier of monolithic isolation. The correct location of a monolithic isolation joint results in saving overall cost of corrosion control systems. The electrostop is coated internally and externally to prevent corrosion and is 100% hydrostatically, electrically and weld tested. Electrojoint monolithic isolation joints gpt industries. Are boltless, rigid pipeline components, factory welded and ready for installation at site. The electrojoint mij eliminates the risk of failure due to improper field assembly of traditional flange components by providing a complete coated isolation system that simply requires two butt welds on. How does one perform due diligence on a sealed, discrete system to ensure it will serve well over the asset lifecycle. Monolithic isolation joints, may be a stock item or built to spec. Overvoltage protection of isolation joints in pipelines. The correct location of a monolithic isolation joint results in saving. Monolithic insulating joints, pipeline insulating joints.
They can be ordered in whatever pipe size is required, and sealed easily and safely without the need for welding. The vatac monolithic insulation joint is a new generation developed product to resolve use problems of old insulating flange. Monolithic insulating joints are used to electrically isolate pipeline segments. G10 isolating ring g10 isolating ring isolating filling material zone a. Manufacturer of leak sealing of monolithic isolation. Ijas limited was formed in 1996 to act as the uk distributor for alfa engineering, a company based near modena, italy. The joints ensure cathodic protection and electrical safety in pipelines. Applications monolithic insulating joints are used for the sectioning of main pipelines gas, oil and water and service lines. Difference between a contraction joint, isolation joint.
Introduction why to use a monolithic isolation joint corrosion destroys approximately 30% of the worlds annual production of steel. Monolithic insulating joint insulating joints are used for cathodic protection. A monolithic joint is a welded prefabricated 3pieces union,for pipeline electrical sectioning,commonly used when the cathodic protection is present to prevent. Contraction joint in concrete their location and construction 4. What is the difference between a contraction joint, isolation joint, expansion joint, construction joint, and a cold joint. Materials design, selection and failure of monolithic. View detailed import data, price, monthly trends, major importing countries, major ports of monolithic isolation joints. Request pdf isolating joint failure monolithic isolating joints of buried pipelines are fundamental to ensure the performance of a cp system. Isojoint monolithic isolating joint by aps farwest.
1167 185 372 733 635 959 819 1110 349 814 910 1125 1414 1209 708 1386 1174 1267 185 632 914 752 132 930 950 1141 1177 1246 665 802 333 1374 778 545 826 596 524 1028 1386