CATALOG Monolithic dielectric joints

Transcription

1 CATALOG Monolithic dielectric joints Monolithic dielectric joints are compact prefabricated structures which guarantee the interruption of electrical continuity in pipeline network. These joints can be provided with or without spark gap, according to needs. Application Monolithic joints can be used in: existing installations and during their execution time, in industrial pipeline networks and gas, hydrocarbon and water distribution stations, before or after gas reduction stations, in storage installations in gas and oil mines, in warehouses and hydrocarbon and gas transport networks, in underground and aboveground installations. Mechanical properties monolithic dielectric joints framework is composed of a ringwelded structure of highly thick metal. These rings are generally made of construction steel or low alloy steel,

2 In the documentation attached to our products you can find all the results of controls and testings made on them. Electrical properties use of high quality insulating materials ensures us excellent quality in our monolithic dielectric joints, spare spark gaps can be used, during electric tests with tension 5 Kv (50Hz), there are no sparks (discharges). This test is carried out before and after hydrostatic test, for 1 minute. monoblock electric resistance is greater than 5 Mohms, under tension 1kV.DC (in dry state). during external coating stagnation test, under tension kv there are no electric discharges. Parameter calculation these are carried out according to WUDT-UC-WO-O standards (Technical control-pressure equipment-resistance calculation Office instructions) PN-EN , other parameters such as deflection time and rupture strength, can be requested by customer, for additional calculation it is necessary to know working pressure. Materials for monolithic dielectric joints welding tubes are used according to PN-EN 10208, DIN 626, API Spec 5L, ASTM A53 standards and others. steel elements (rings) are plates, smelting vessels and forged pieces according to PN-EN 10028, for airtightness O-RING type joints are used, with nitrile,fluorine or silicone rubbers, which are resistant to ageing and wear and tear, as insulating materials we have epoxy laminates, according to PN-EN DIN Welding and non-destructive tests steel elements in monoblocks are welded using MAG method, according to standard and procedures certified by specialized institutions, all welded cords are inspected using non-destructive control methods, such as VT (visual control), PT (penetration methods) UT (ultrasonic method). These tests are carried out by qualified staff and certified by competent institutions (Welding Politechnic Institute of Silesia). External Coatings polyurethane coating according to PN-EN standard, thermal contraction coating according to PN-EN standard, or CANUSA or REIHEM Epoxy paint coating according to PN-EN standard. Internal coatings Epoxy paint coating according to EN EN standards.

3 Controls structure, dimensions and materials, hydrostatic resistance test, under pressure 1,5 x MOP (maximum operating pressure). During this test monoblocks are provided with stoppers. stagnation pneumatic tests, under pressure of 6 bars, electric test, under alternate tension 5kV/50 Hz for 1 minute (there are no sparks), resistance greater than 5 Mohm, under tension of 1kv. For special orders, customers can obtain monolithic dielectric joints, additionally controlled to electrical resistance, for water-filled joints: R =ρ x L/S ρ water resistance [Ωcm], L internal wall length [cm], S flow cross-section [cm²] Results of controls mentioned above are presented in certificates 3.1 according to PN-EN A1 or another type according to customer s instructions. Products Parameters presented in the tables, correspond to standard type monoblocks, there is the possibility to manufacture monoblocks with greater parameters, e.g., operating pressure up to 420 bars (ANSI 2500), operating temperature of 50 C up to +160 C, they can additionally be provided with internal or external spark gap. Basic parameters of monolithic dielectric joints type MOP 25 (ANSI 150) Operating pressure (max) MOP. Bar 25,0 Pressure resistance test PT bar 37,5 Minimum and maximum operating temperature TS, C Electric test with tension AC 5kV(50Hz) no discharge Resistance with tension DC 1kV (in dry state) R,MΩ 5,0

4 Basic parameters of monolithic dielectric joints type MOP 63 (ANSI 300) Operating pressure (max) MOP. Bar 63,0 Pressure resistance test PT bar 94,5 Minimum and maximum operating temperature TS, C Electric test with tension AC 5kV(50Hz) no discharge Resistance with tension DC 1kV (in dry state) R,MΩ 5,0

5 Basic parameters of monolithic dielectric joints type MOP 100 (ANSI 600) Operating pressure (max) MOP. Bar 100,0 Pressure resistance test PT bar 150,0 Minimum and maximum operating temperature TS, C Electric test with tension AC 5kV(50Hz) no discharge Resistance with tension DC 1kV (in dry state) R,MΩ 5,0

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