Monolithic Insulating Joints

CCE supplies the complete range of monolithic insulating joints (MIJs) that are used for the sectioning of main pipelines in the oil, gas and water industries to ensure full efficiency of cathodic protection systems and ensure electrical safety. They serve as a positive, leak-proof, block against the flow of electric current in all piping systems.

CCE and our suppliers can design custom MIJs to cater for ‘heavy’ conditions such as external loads and more.

One of the best ways to manage electrical resistance between pipeline sections and adjoining structures is to use purpose-built monolithic insulating joints. Not only are they used for sectioning oil, gas, water and petrochemical pipelines but they also do not interfere with active corrosion prevention systems. Our range of MIJs are superior to insulation kit gasket assemblies because they are pre-assembled, tested and ready to be welded and installed where required.

MIJs also serve as a positive, leak-proof, block against the flow of electric current in all piping systems. CCE and our suppliers can design custom MIJs to cater for any situation.

Zunt Italiana has designed and manufactured monolithic insulating joints for over two decades, which is why we supply their quality products. These components are designed, manufactured and tested in full compliance with the most stringent international standards and client specifications. Fittings are available in flanged, weld/weld and screwed ends.

High pressure monolithic insulating joints for water, gas, oil and petrochemical industry Insulating joints for high temperature fluids, sour service applications, conductive fluids and more

Isolation spools
Low pressure service joints
Pre-assembled insulating flanges
Insulating kit for flanges
Steel polyethylene transition fittings

STANDARD PRODUCTION RANGE

SIZE	from ½” to 120″ and over
RATING	from ANSI 150 up to ANSI 2500 and over

TECHNICAL FEATURES (Zunt standard)

Design Factor	0.6
Temperature range	-10°C / 70°C
Hydrotest pressure	1.5 times the Design Pressure
Dielectric Strength Test	> 3 kV for 1 min. – 50 Hz AC
Electrical Resistance Test	in dry conditions > 25 MOhm – 1000 V DC
Coating / Lining	epoxy resin
N.D.E.	MPI, UT, X-Rays, Dye Penetrant on welds (as applicable)

Design Calculations to ASME VIII Div. 1 App. 2
WPS, PQR, WPQ to ASME IX (other codes on request), EN 15614, EN 15609, EN 288
Applicable standards: NACE, DM 17/04/2008, UNI 10285, UNI 11105, EN 1594
PED / ATEX compliance on request

PATENTED independent double sealing system applied from 16” #600 and over (also available on smaller sizes/ratings on request)

Dimensions are indicative only and may be altered without prior notice
Pipe pups : API 5L / ISO 3183 / EN 10208-2 / ASTM A106 / ASTM A333
Alternative wall thickness and quality of pipes available on request
Bevelled ends to API 5L
Dimensions, weights and technical features of insulating joints over size 48″ Class rating ANSI 600 will be provided with a specific bid

Custom Made Production

Manufactured in compliance with the client specification

PRODUCTION RANGE

SIZE	from ½” to 120″ and over
RATING	from ANSI 150 up to ANSI 2500 and over

SPECIAL FEATURES (On request)

Design Factor	as per client’s specification
Low Temperature design	down to -50 °C
High Temperature design	up to +165 °C
Dielectric Strength Test	up to 20 kV for 1 min. 50 Hz AC
Electrical resistance Test	in dry conditions > 200 MOhm – 1000 V DC
Coating/Lining	as per client’s specification
Finite element analysis	on request
PED / ATEX compliance	on request

EXTRA TESTING (on request)

Helium Test
Torsion test
Hydro-thermo-bending test
Electrolytic immersion test
Hydraulic fatigue test
Air leak test
Vacuum test