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Monolithic insulation joint
Are boltless, rigid pipeline components, factory-welded and ready for installation
A design which has proven successful throughout the world even for highest requirements
Maintenance-free
Suitable for underground installation without the need for special precautions or for above ground installation
Absolutely no impairment due to external influences
Mechanical properties
The excellent mechanical properties are achieved by a rigid design of statically favourable form, using thermo-setting plastics free from cold flow as insulating materials
The welded unit provides a safe and reliable connection even over extremely long period of operation without the risk of the secured and locked unit loosening or separating
Countless tests, prototype tests and empirical data gained during the course of many years of practical operation confirm the soundness and correctness of the complete welded design.
Electrical properties
The dimensioning and practical arrangement of the insulating sections within the overall design in addition to technical production factors, in conjunction with insulation materials of a suitable quality, result in the ideal overall electrical behavior of the insulating joints
large external insulating length, thus eliminating the possibility of spark over
Very good dielectric strength, substantially greater than is the case with conventional insulating flanges
A decisive factor in safe operating behavior, however, is linearity between the voltage applied and the resistive leakage current
Calculation
In accordance with standards such as ASME, DIN 2470, TRBF and other international standards, or in accordance with IPS / IGS specific requirements. If no other regulations specified, the IPS or IGS specification are valid.
Additional forces such as bending moments and tensile forces etc. must be specified by the customer
Basically, all components of forces and force values occurring can be taken into consideration during design calculation
All mechanical analysis will be done by ANSYS Software and will be interpreted acc. To ASME VII Div. I / II standard.
Applications
Suitable for flow media such as natural gas, crude oil, kerosene, gasoline, propane, butane, coal gas, ethylene, nitrogen and drinking water etc.
Media such as sour gas and oxygen necessitate special materials and design bases
Standard versions up to maximum +80 °C constant temperature
Special versions for district heating pipelines up to +150 °C
Materials
Pipe materials used are in accordance with API, ASTM/ASME or DIN standards
Seamless rings made of plate material or of forged quality, depending upon costumers requirements and design calculations Seals materials are selected as e.g. FKM(Viton), NBR, EPDM and other materials according to ASTM D 2000
Insulating materials are supplied according to ASTM D709 standard
External coating
We apply two layers Epoxy Zink Rich as primer, and two layers Polyurethane as top coat as our standard.
Other types of coating are possible according to agreement and purpose such as Bitumen primer, coal tar epoxy resin and others
Internal lining
As per our standard without lining
Electrically conductive media and deposits require an appropriate internal lining
Virtually all types of lining can be applied upon agreement
Tests/Inspections
According to the agreed requirements, usually:
a. A strength and tightness test with water
b. An electrical breakdown test with 3000 V/1 minute,
AC, 50 Hz (both before and after the hydrostatic
pressure test as our standard)
c. An electrical resistance test, standard 1000 V DC
d. Checking the material certificates
e. Evaluation of the destructive and non destructive tests
f. Dimensional checks
Depending upon the basis of the order, the tests are conducted either by our quality assurance department, by the customer himself or by an authorized third party |
