MIJ - Insulated Joint
Pipelines employ insulating joints to provide electrical isolation and stop corrosion. They offer cathodic protection systems current spreading. They offer electrical isolation between the pipeline segment and the nearby pipelines and structures.
To reduce the chance of electrical bridging across the joint, the PetroSan insulating joint is designed to be put above ground if possible or in an inspection pit when dry. Between two pipeline sections, it is meant to be girth welded.
PetroSan Oilfield Engineering Co. is well known quality mij manufacturer and fabricators of insulated joint, isolation joint, electrical isolation joint, monolithic isolation joint (mij), pipeline insulation joint, cathodic protection joint, api 5l pipe insulation joint manufacturer and suppliers
Preventing harmful electrochemical interactions and enhancing the cathodic protection system’s efficacy are the goals of the isolation joint. In order to guarantee efficient current distribution for the cathodic protection system, isolating joints are also utilized.
Insulating flanges serve as the foundation for improved products known as insulating joints. They are an essential and crucial pressure component of steel pipeline cathodic protection systems. It is extensively utilized in steel pipeline cathodic protection systems.
The sizes of monolithic insulated joints range from 50 NB to 1600 NB (2″ through 64″), and the pressure ranges from ANSI 150 to ANSI 1500.
Monolithic isolation joints undergo 100% hydrostatic, electrical, and weld performance testing and are coated to prevent corrosion. Installed in inlet and outlet pipes, on meters, tanks, pumping stations, etc., monolithic isolation joints offer electrical sectioning and passive corrosion protection.
Advantage/Benifits of MIJ – Insulating Joints.
One advantage of using this type of joint is that it lowers the overall cost of the corrosion system. Additional advantages include isolation of the pipeline cathodic protection system, protection against earthing currents at residential and commercial buildings, and preventing increased corrosion from cathodic protection or stray currents. Common Reference ASME VIII Div.I Appx. 2-EN 10204 3.1, ASME B 31.3-ASME B 31.4-ASME B 31.8, Pressure Between ANSI 150 and ANSI 1500.
Parameters Of Insulating Joints
- Design Pressure: (BarG) 6 To1034.5
- Design Temperature: (°C) Standard Application 0 To 90° – Special Application -173 To 180°C
- Rating: (ASME/ANSI #) Class 150 To 2500 “ANSI/ASA” – 3000 To 15000 “API”
- Ends: ”BW” Butt Welded: – API 5L / B16.25 / B16.5 / MSS SP75
- Connection Pipe: 15 To 3000mm / 1/2″ To 120″
- Connection Pipe WT: 7 To 152.4mm / 0.154″ To 6″
- Joint Overall Length: 150 To 12000 (over 3000 Insulation Joint + Extension Pipe)
- Installation: Above Ground / Underground / Subsea
- Hydrostatic Test: 5 Times The Design Pressure ( Or As Per Customer Requirements )
- Dielectric Test: 5 To 15 KV @ 1 Minute AC 50÷60 Hz (Special 20 KV @ 1 Minute AC 50÷60 Hz)
- Electric Insulation Test: > 200 MΩ @ 1000 Volt DC ( Special > 100 GΩ @ 5000 Volt DC )
MIJ-Insulation Joint Pipe materials :
API 5L : x42, x46, x52, x56, x60, x65, x70, x80 (PSL1 & PSL2) Sour Service, HIC-SSC Tested
Stainless Steels : TP304, TP316, TP301, TP302, TP303, TP309, TP310, TP317, TP321.
Duplex : 2205 (UNS S31803/S32205), 2304 (UNS S32304), and Zeron 100 (UNS S32760)
Super Duplex : S32750 (F53 or SAF2507) and S32760 (F55 or 1.4501)
High Nickel Alloys : Inconel 625, Alloy 20, Monel 400, Nickel 200, Hastelloy C276, Inconel 600, Nickel alloy 188, Alloy 617, Incoloy 800,Monel K500
Standard : as per ASTM A312, IS3589 and Duplex Steels as per ASTM/ASME or DIN standards.
MIJ Seamless forged rings made of quality :
ASTM 694- F42, F46, F52, F56, F60, F65, F70, F80, ASTM A105, ASTM A350-LF1, LF2, LF3, ASTM A182, ASTM depending upon customer requirements and design calculations.
MIJ Sealing materials :
FFKM, FKM (Viton), NBR, HNBR, EPDM, PTFE and other materials according to ASTM D2000.
MIJ Insulating materials:
ASTM D709 & D695 standard.
Design Standards:
PetroSan MIJ – Insulation Joints manufacturer and fabricators :
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Manufacturer of ASTM A106 GR.B MIJ – Monolithic insulation Joint, Manufacturer of API 5L x42 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x46 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x52 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x56 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x60 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x65 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x70 MIJ – Monolithic insulation Joint, Manufacturer of API 5L x80 (PSL1 & PSL2) Sour Service MIJ – Monolithic insulation Joint, , Manufacturer of API 5L HIC-SSC Tested MIJ – Monolithic insulation Joint,
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