Pipeline Monolithic Insulating Joint Pipe DN300 Series a Butt Welding End

• Customization: Available
• After-sales Service: 7*12 Hours
• Warranty: 36 Months
• Model NO.: 12" DN300
• Material: Carbon Steel
• Connection: Welding
• Port of Delivery: Tianjin
• Transport Package: Wooden Case
• Specification: DN300
• Trademark: XINQI
• Origin: Cangzhou
• HS Code: 730799
• Production Capacity: 1000pieces/Day

Product Description

What is insulating joint?
The Purpose of the isolation joint is to prevent detrimental electro-chemical interaction and improve the effectiveness of the cathodic protection system. Isolating joints are also used to ensure effective current distribution for cathodic protection system.

Insulating joints are improved products based on insulating flanges. They are an indispensable and important pressure component in the cathodic protection system of steel pipelines. It is widely used in the cathodic protection system of steel pipelines.

Monolithic insulated Joints are available in sizes ranging from 50 NB to 1200 NB (2" thru 48") and pressure ranging from ANSI 150 to ANSI 900.

Monolithic Isolation Joints are coated to prevent corrosion and are 100% tested hydrostatically, electrically and for weld performance.  Monolithic Isolation Joints provide electrical sectioning and passive protection against corrosion, they are installed in inlet and outlet pipes, on meters, tanks, pumping station, etc.

Usage
Pipeline insulating joints are used both for onshore and offshore projects. It is used worldwide for permanently controlling the flow of electrical currents or electrically isolating pipe sections in pipes and piping systems. Effective management of cathodic protection programs. applicable medium: suitable for oil, gas, water, chemical raw materials, and ore slurry.

Materials

1.The metal material of the insulation joint shall be the killed steel smelted by electric furnace or oxygen converter, and the steel smelted at a temperature lower than -20°C shall be refined outside the furnace.

2.The technical requirements of steel should meet the design requirements of the relevant pipeline engineering design department.

3.The steel used for insulation joint manufacturing shall have quality certificate, and the manufacturer of insulation joint shall check and accept the steel according to the quality certificate.

4.Forgings used for compression elements shall comply with NB/T 47008 and NB/T 47009.

5.Forgings used for compression components should be selected according to the design pressure, weight and size.

Fields of application

This standard is applicable to the monolithic insulating joints with a nominal diameter of no more than 600mm and a design pressure of no more than 16MPa and a nominal diameter of no more than 1400mm and a design pressure of no more than 12MPa, referred to as insulating joints, in the electric corrosion protection engineering of steel pipelines of buried or above ground transportation of petroleum and natural gas. Its applicable design temperature range is -45ºC ~ 100ºC.

Quality Requipments

Insulation strength:2500V 50Hz 1 minute no breakdown or arc;

Insulation resistance: DC 1000V resistance ≥6M ω;

Hydrostatic test pressure: 1.5 times of design pressure;

Airtight test pressure: equivalent to design pressure;

Non-destructive testing: according to JB4730-94, all butt joints are 100% radiographic inspection, and all other bearing welds are 100% magnetic particle inspection;

Groove: adopt API5L standard.

Installation Requipments

1. Avoid welding within 50 meters of the installation of insulation joints;

2. After connecting the insulation joint with the pipeline, do not lift the pipeline within 5 meters of the joint;

3. Pressure test of insulation joint and pipeline instrument.