ElectroStop by GPT

ElectroStop Monolithic Pipeline Fittings Positive, leak-proof, long-lasting block against the flow of electric current in piping systems.
Description
 
The Industry’s Best Dual O-Ring Seal
The ElectroStop®  monolithic isolation fittings manufactured by GPT will serve as a positive, leak-proof, block against the flow of electric current in all piping systems. When you bury the ElectroStop® isolation joint you also bury maintenance costs; an especially important feature for system operators and engineers.
 
Eliminates Short Circuits
Bolts, sleeves and washers - the major source of short circuits in most isolation assemblies - are eliminated with the ElectroStop® isolation joint. Each joint is electrically tested during production to assure integrity, performance, isolating properties.
 
Eliminates Field Assembly
The ElectroStop® isolation joint is completely factory assembled and tested.  There are no flanges, gaskets, nuts, bolts, sleeves or washers to handle and consequently no fluid leaks due to improper 
field assembly.
 
Is Coated Both Internally and Externally
A two-part bonded epoxy is sprayed to a thickness of .016” -.024” (.40 to .60mm) to within 2” (50.8mm) of each weld end. Each joint is tested for coating thickness uniformity and for holidays.
 
Is 100% Hydrostatically Tested
All ElectroStop®  fittings undergo hydrostatic pressure tests at 1.5 times rated operating pressure in accordance with ASME B31.3 standards.  Testing is normally conducted for 30 minutes for joints up to 6” and 60 minutes for 8” to 24” joints but can be tested per customer specifications. A pneumatic test is held at 87 psi for 10 minutes.
 
Is Completely Weld Inspected
All ElectroStop®  fittings undergo a weld inspection with combinations of  ultrasonic (UT) and magnetic partical (MT) on all welds. In addition, X-ray tests can be conducted upon request. 
Manufactured under an ISO 9001:2008 Quality Management System.

 

Benefits

  • Eliminates short circuits.
  • Eliminated field assembly.
  • Eliminates maintenance.
  • Is less expensive.
  • Is coated both internally and externally.
  • Is 100% electrically tested.
  • Is completely weld inspected.
  • Is manufactured in accordance with ISO9001:2000 specifications.
  • 100% butt weld construction
     

Sizes

  • Available in any diameter.
  • Available in any ANSI Class & Stocked in ANSI Classes 150#, 300-400# and 600#.
     

 

 

Warranty

All products are warranted against failure caused by manufacturing defects for a period of one year. Any product found to be so defective and returned within one year from date of shipment will be replaced without charge. The above warranty is made in lieu of, and we disclaim, any and all other warranties, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, and buyer agrees to accept the products without any such warranties. We hereby disclaim any obligation or liability for consequential damages, labor costs or any other claims or liabilities of any kind whatsoever.

Installation

THE ELECTROSTOP™ WELD-IN MONOLITHIC ISOLATION FITTING INSTALLATION GUIDE

The ElectroStop™ is a complete factory assembled and tested monolithic isolation fitting which will serve as a leak proof, long lasting block against the flow of electrical current in steel piping systems. Care should be used during the handling and installation process so as not to damage the fitting.

Only two (2) welds are required for installation.

The ElectroStop™ may be installed either above grade or buried below grade.

Note: WHEN INSTALLING IN A VERTICAL POSITION ABOVE GRADE, THE WELDED END OF THE COLLAR (HUB) SHOULD FACE UP.

The end filled with the epoxy fill (opposite end of the welded collar of hub) can have a concave area and possibly retain moisture and can be sensitive to ultra violet light exposure.

THE SUGGESTIONS BELOW SHOULD NOT PRECLUDE FOLLOWING OF ALL COMPANY, LOCAL, STATE, OR FEDERAL CODES AND/OR SAFETY REQUIREMENTS AND/OR REGULATIONS. DESIGN CONCERNS, INCLUDING ELECTRICAL SAFETY PRECAUTIONS, GROUNDING, MECHANICAL STRESSES, ETC. SHOULD BE ADDRESSED PRIOR TO USE OR INSTALLATION. ALWAYS WEAR PROPER SAFETY EQUIPMENT FOR PERSONAL PROTECTION. CONSULT WITH YOUR COMPANY.

The ElectroStop™ fitting should be installed just like any other weld-in fitting or piece of pipe with the only exceptions being:

  • The temperature of the collar (hub) should not exceed 212 degrees Fahrenheit (100 degrees Celsius).
  • Piping being attached to the ElectroStop™ must be properly aligned so as not to put undo mechanical stresses on the ElectroStop™.
     

The pipe pups on the ElectroStop™ are intended to act somewhat as a heat sink and should not be shortened. If the fitting is too long for the installation location, cut the needed length out of the existing piping, not the ElectroStop®.

During the welding operation a temperature sensor such as a thermometer or thermocouple should be secured to the collar (hub) of the ElectroStop™. As a precautionary procedure, wet rags or other cooling methods are sometimes used to reduce heat at the collar (hub) area.

COATING

After the welding operation is completed, The ElectroStop™ fitting and welds should be prepared for your corrosion protection coating or tape just like any other bare or shop coated fitting or piece of pipe.

SUPPORT AND BACKFILLING

Care should be used to assure uniform support and compaction around the entire ElectroStop™ fitting. Undo mechanical stresses caused by improper support or backfilling could cause damage to the ElectroStop™ that could result in leakage.

TESTING AND CERTIFICATION

All ElectroStop™ fittings undergo a weld inspection with combinations of ultrasonic (UT), magnetic particle (MT) and dye penetrant (LT) on all welds. X-Ray tests are preformed upon request.

We certify that each standard order ElectroStop™ will be factory tested at 1-1/2 times the rated operating pressure for the amount of time listed below and in accordance to the latest ANSI Standards.

 

Pipe Size Hydrostatic Minimum Test Time
2"-4" 30 minutes
8"-24" 60 minutes

 

After completion of the hydrostatic tests, The ElectroStop™ are electrically tested to assure an electrical resistance of 25 Mohms (wet or dry conditions @ 20( C) @ 1kv D.C. and a minimum breakdown voltage of 5kv @ 50 hz for 1 minute.

Control over all stages of production is ensured by close adhearance to an in-place and ongoing ISO 9001 Quality Assurance Program which is constantly monitored and subject to periodic outside audit. A qualified inspector witnesses all tests.

Typical Specification

GPT ELECTROSTOP™ MONOLITHIC ISOLATING FITTING STANDARD SPECIFICATION AND STANDARD DESIGN SPECIFICATION

STANDARD SPECIFICATION:

Monolithic isolation fittings shall be boltless and completely factory assembled in accordance with the appropriate requirements of ASTM, API, DIN and BS codes. All welds shall be butt weld construction. The dielectric isolation material shall be a thermosetting fiberglass epoxy material. Sealing shall be by two (2) static, self energized O ring seals housed in accurately machined grooves, fully protected from cavitation in full compliance with ASME design codes. Interior and exterior coating shall be a two part epoxy with a thickness of 12 to 15 mils to within 2” of each end. Testing shall be Electrical (@5kv, 25 Mohm), Hydraulic (@ 1.5 x O.P.) and Weld (Ultrasonic/Magnetic Particle/Dye Penetrant).

The Monolithic Isolation Fitting shall be the ElectroStop™ Isolation Fitting as manufactured by Pipeline Seal & Insulator, Inc., Houston, Texas.

Quality Assurance

Each monolithic isolation fitting shall be manufactured at a facility that has a Registered ISO 9001:2000 Quality Management System. Copy of current ISO 9001:2000 Registration shall be provided with material submittal.

STANDARD DESIGN SPECIFICATIONS:

ElectroStop™ isolation fittings provide permanent electrical isolation of piping sections, facilitating the management of a cathodic protection system. These fittings will be completely factory assembled.

Design Features
 
  • A low uniform profile enhances ease of handling and field coating or tape wrapping.
  • Fittings can be welded into the pipeline above grade, utilizing standard pipeline welding procedures, then lowered into the trench by a sling.
  • There is a natural heat sink to dissipate circumferential weld heat during installation.
  • They are tamper proof and maintenance free after installation.
  • Each fitting will be the following minimum length which will include the insulating mechanism and pipe pups.
  • See provided charts. Literature contains more sizing information.
     
     
150# ANSI CLASS (PN or DP 25)
  
 Dia
(inches)
Wall
thickness

(inches)
Pipe
grade
Dimensions (inches) Weight
(Lbs)
A C D E

6

0.28

B

8.50 27.50 5.12 11.10 65.3
8 0.32

B

10.59 27.50 5.75 10.85 101.2
10 0.37 B 12.60 31.50 6.22 12.70 151.8
12 0.41 B 13.54 39.33 6.30 16.52 242.0
14 0.31 B 16.50 23.62 7.48 8.07 220.0
16 0.34 B 18.82 35.43 8.27 13.58 386.9
18 0.31 B 20.83 31.50 8.82 11.34 338.8
20 0.37 B 22.83 39.37 9.21 15.08 514.5
24 0.37 B 27.36 39.37 10.79 14.29 704.0
26 0.37 B 28.90 39.37 11.26 14.05 719.4
28 0.37 B 30.87 39.37 11.65 13.95 783.2
30 0.37 B 33.07 39.37 11.97 13.70 860.2
32 0.37 B 35.04 39.37 12.36 13.50 939.4
36 0.37 B 38.98 47.24 12.99 17.12 1174.8

 

150# ANSI CLASS (PN or DP 25)

150# ANSI Pressure Rating: 285 psi
Continuous Operating Pressure: 355 psi
Test Pressure: 540 psi
Working Temperature: 14°F to 212°F (-10°C to 100°C)
Electrical Resistance: 25 Mohms @ 1 kV DC (dry air)
Breakdown Voltage: 5 kV @ 50 Hz for 1 minute (dry air).

 
300-400# ANSI CLASS (PN or DP 64)
  
 Dia
(inches)
Wall
thickness

(inches)
Pipe
grade
Dimensions (inches) Weight
(Lbs)
A C D E

6

0.28

B

8.50 27.50 5.51 11.00 68.2
8 0.32

X52

10.63 27.50 6.30 10.60 127.6
10 0.37 X52 13.86 31.50 7.09 12.20 202.8
12 0.41 X52 15.91 39.33 8.03 15.67 319.0
14 0.37 X52 17.64 31.50 8.43 11.54 338.8
16 0.44 X52 19.49 39.37 9.21 15.08 524.7
18 0.47 X52 21.50 31.50 10.24 10.63 519.2
20 0.50 X52 23.82 47.24 10.79 18.22 778.2
24 0.50 X52 27.76 47.24 12.76 17.24 998.7
26 0.56 X52 29.76 39.37 13.23 13.07 1062.6
30 0.63 X52 34.61 47.24 14.80 16.22 1676.4
36 0.75 X52 40.59 51.18 17.32 16.92 2481.6

300-400# ANSI CLASS (PN or DP 64)

300# ANSI Pressure Rating: 740 psi
400# ANSI Pressure Rating: 990 psi
Continuous Operating Pressure: 990 psi
Test Pressure: 1,500 psi
Working Temperature: 14°F to 212°F (-10°C to 100°C)
Electrical Resistance: 25 Mohms @ 1 kV DC (dry air)
Breakdown Voltage: 5 kV @ 50 Hz for 1 minute (dry air).

     
600# ANSI CLASS (PN or DP 100)
  
 Dia
(inches)
Wall
thickness

(inches)
Pipe
grade
Dimensions (inches) Weight
(Lbs)
A C D E

6

0.28

X52

9.45 27.50 5.91 10.80 81.4
8 0.32

X52

11.57 27.50 7.01 10.25 138.6
10 0.36 X52 13.86 31.50 8.03 11.70 220.5
12 0.41 X52 15.91 39.33 8.82 15.25 363.0
14 0.37 X52 17.83 31.50 9.84 10.83 389.4
16 0.44 X52 19.76 39.53 10.79 14.29 568.8
18 0.47 X52 21.73 31.50 11.81 9.84 587.4
20 0.50 X52 23.98 47.24 12.68 17.28 864.2
24 0.50 X52 29.34 47.24 14.09 16.58 1289.6
26 0.56 X52 30.83 47.24 15.20 16.00 1467.4
30 0.63 X52 35.71 51.18 16.77 17.20 2151.6
36 0.75 X52 42.52 51.18 19.37 15.90 3306.6
600# ANSI CLASS (PN or DP 100)

600# ANSI Pressure Rating: 1,480 psi
Continuous Operating Pressure: 1,480 psi
Test Pressure: 2,225 psi
Working Temperature: 14°F to 212°F (-10°C to 100°C)
Electrical Resistance: 25 Mohms @ 1 kV DC (dry air)
Breakdown Voltage: 5 kV @ 50 Hz for 1 minute (dry air).




  • The minimum bore of each fitting will be equal to the standard bore tolerances of the pipe in which it will be installed.
  • Each fitting uses a method of closure that will positively maintain a pre-stressed load on the insulation section that is in excess of the end loading forces at test pressure. This is accomplished by weld closure.
  • The insulating member will be fiberglass reinforced thermosetting epoxy resin. The sealing gasket will be Butadiene/Acrylonitrile rubber conforming to ASTM D2000.
     

MANUFACTURING AND MATERIAL SPECIFICATIONS:

Manufacturing

  • The ElectroStop fittings described in this proposal will be manufactured to meet the material and manufacturing requirements established in the specification.
  • These fittings will be manufactured in accordance with the most recent applicable ANSI, API, DIN or JIS standards as specified. The qualification of welders, their examination and registration will be conducted according to API 1104 or DIN 8560. All welding processes and procedures will be performed in accordance with API 1104 or DIN 8560.
  • Welding Procedure: The forging of these fittings will be connected to the pipe pups by welds whose root passes are deposited by the manual inert gas (MIG) arc welding process. The balance of welds will be made by submerged arc process.
     

Material Specifications

  • All steel components supplied by the manufacturer and used in the fabrication of these fittings will meet the customer's requirements. This compliance will be validated by the submission of Mill Certificates giving the chemical and physical properties, if requested.
  • The sealing elements will be fabricated from Butadiene/Acrylonitrile Rubber.
  • The insulating gasket will be stratified epoxy resin with fiberglass or an equal material.
  • Both interior and exterior coatings will be 2-part epoxy.
     

TEST PROCEDURES:

All testing will be performed in accordance with the requirements of this specification. The manufacturer will supply certifying documentation to substantiate this fact, if requested.


Steel Parts

All steel components supplied by the manufacturer and used in the fabrication of these fittings will conform to ANSI, API, DIN or JIS standards substantiated by the submission of mill certificates listing physical and chemical properties, if requested.

Dimensional Verifications

All critical dimensions will be according to the drawings approved by the customer. These dimensions will be checked and approved during production by responsible supervisory personnel of the manufacturer. Variances from the agreed dimensions will be committed to drawings and these variances will be subject to the approval of the customer's inspector.

Weld Procedure

Will conform to ASME Section 9.

Radiographic Testing

The manufacturer will have a qualified inspector confirm the results and pass approval on the non-destructive radiography tests at the time of their completion. All radiographs will be delivered to the customer&

How to Order

To order ElectroStop™ insulated fittings, please indicate the following:

  1. Quantity
  2. Nominal pipe size
  3. ANSI, DIN, API pressure class or actual working pressure
  4. Pipe grade
  5. Wall thickness
  6. Temperature limits
  7. Products conveyed
     

Contact Farwest Corrosion for specials or non-standard sizes.