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Tuff-N-Nuff® Pipeline Rock Shield

Tuff-N-Nuff® Pipeline Rock Shield

Pipeline Rock Shield

Tuff-N-Nuff Rock Shield Tuff-N-Nuff Rock Shield

Rock Shield is manufactured in either rolls or pads based on the pipe diameter to be protected. Rolls are provided for pipe diameters up to 20″. Pads are available for pipe diameters 24″ or larger. Roll and pad widths are determined by the pipe circumference and are designed to overlap for complete protection of the pipe. Rock Shield Rolls are available in various lengths for cigarette wrapping. Pipeline Rock Shield Pads are provided in 6 ft. lengths.

Tuff-N-Nuff Pipeline Rock Shield

Tuff-N-Nuff Protective Rockshield for Steel or Plastic Pipe

Tuff-N-Nuff Pipeline Rock Shield Tuff-N-Nuff Rock Shield

TUFF-N-NUFF Rock Shield is a non-woven mat consisting of small diameter (approximately 0.050″) strands of flexible PVC. The strands are bonded to each other in a controlled, random pattern. Pipeline Rock Shield protects pipe coatings from direct impact during backfilling operations. It also provides longterm protection by keeping hard objects in the backfill away from the pipe coating during operation of the line. TUFF-N-NUFF protects the pipe coating from these abrasive objects as lateral and longitudinal movements occur.

Flexible Pads or rolls come in convenient sizes and can easily be installed by two or three men. Therefore labor costs are minimal.

Weather is never a problem for the PVC material which is tested from -50 to +120 degrees C.

Rolls are ideal for cigarette wrapping pipes with diameter up to 20 inches. Pads are provided for large diameter pipes.

Tuff-N-Nuff Protective Rock Shield is Porous. It does not trap water. It permits accurate cathodic testing.

Tuff-N-Nuff Pipeline Rock Shield

Tuff-N-Nuff Pipeline Rock Shield

Tuff-N-Nuff Pipeline Rock Shield

Advantages

  • Custom Cut Rolls or Pads: No waste, no overwrap, no field cutting, no added cost.
  • Flexible P.V.C.: To accommodate normal pipe movement resulting from ground shifting, thermal expansion or contraction.
  • Lightweight: Easy to handle and transport. 11mm thick TNN = .825 lbs per sq/ft. Truckload = 43,000 lbs.
  • Porous Texture:Does not trap water. Allows accurate cathodic testing.
  • Excellent Impact Resistance: 11mm – 150.0 in lbs.
  • Color: Yellow. Identifying in ground pipe to third party.
  • Rolls are excellent for cigarette wrapping.
  • Pads are ideal for large diameter pipes. </li

Laboratory Tested for:

  • Impact Resistance
  • Compression
  • Cathodic Access
  • High Temperature Resistance
  • Low Temperature Flexibility
  • Tensile/Elongation
  • Penetration Resistance

Availability and Sizes

TUFF-N-NUFF is available in 6mm & 11mm thickness and in rolls or pads up to 72″ wide. TUFF-N-NUFF can be produced in any length. However, rolls longer than 60 feet can be difficult to handle due to increased weight. For larger diameter pipeline applications, TUFF-N-NUFF is available in custom length pads in 36″ and 72″ widths. (No extra Charge)

Physical Property Data for 11mm Pipeline Rock Shield
Property Test Method Typical Results
Impact Strength ASTM G14 spherical point 241 inch-pounds1
Impact Strength ASTM G14 (-35° F) 235 inch-pounds1
Compressive Strength ASTM D1621 (modified2) 54 psi @ 50% compression
Impact Resistance ASTM G13 (modified3) No Failure @ 6″ rock
Tear Strength ASTM D624 69.6 lbf/in of thickness
Tensile Strength ASTM D4595 1,378 psi
Elongation ASTM D4595 459%
Low Temp Brittleness ASTM D746 “-62° F
Bacteria Resistance ASTM G22 No Growth
Cathodic Protection Custom No inhibiting effect
Weight 0.825 lb/ft2
Melt Temperature Custom 300° F
1 Compare to 27 inch-pounds for unprotected 16-mil thick Fusion Bonded Epoxy coating tested in the same manner.
2 Two 3 x 2″ x 2″ samples stacked together and compressed to 50%.
3 Test modified to include rocks progressing in size from 1 ½”, 3″, 4″ and 6″, 10 drops each. Each drop consisted of releasing 50+ lbs of stone from a height of 6′-0″ onto an epoxy coated plate protected by Tuff-N-Nuff. The plate was inspected for holidays after each drop.

 

 

Physical Property Data for 6mm Rock Shield
Property Test Method Typical Results
Impact Strength ASTM G14 spherical point 127.5 inch-pounds1
Compressive Strength ASTM D1621 (modified2) 62 psi @ 50% compression
Impact Resistance ASTM G13 (modified3) Failure after 5th cycle of 4″ rock
Tear Strength ASTM D624 69.6 lbf/in of thickness
Tensile Strength ASTM D4595 1,378 psi
Elongation ASTM D4595 459%
Low Temp Brittleness ASTM D746 “-62° F
Bacteria Resistance ASTM G22 No Growth
Cathodic Protection Custom No inhibiting effect
Weight 0.675 lb/ft2
Melt Temperature Custom 300° F
1 Compare to 27 inch-pounds for unprotected 16-mil thick Fusion Bonded Epoxy coating tested in the same manner.
2 Two 3 x 2″ x 2″ samples stacked together and compressed to 50%.
3 Test modified to include rocks progressing in size from 1 ½”, 3″, 4″ and 6″, 10 drops each. Each drop consisted of releasing more than 50 lbs. of stone from a height of six feet onto an epoxy coated plate protected by Tuff-N-Nuff. The plate was inspected for holidays after each drop.

 

Installation Procedures

Tuff-N-Nuff Rock Shield Tuff-N-Nuff Rock Shield

Pipeline Rock Shield is installed in any of three ways, depending on pipeline diameter, available equipment, and contractor’s choice.

For pipelines measuring 20″ in diameter or less. The “cigarette wrap” method is recommended. Unroll TUFF-N-NUFF Rolls along the top of the pipe allowing the free edges to hang down. The width of the TUFF-N-NUFF roll is matched to the circumference of the pipe and includes a nominal overlap of 4″. Secure the free edges in place with monofilament tape or nonmetallic strapping overlapping the ends at the 6 o’clock position of the pipe for maximum protection.

72″ in wide TUFF-N-NUFF Pads are available from the factory cut to length matching the circumference of the pipe. Pads are wrapped around the circumference of the pipe, with ends overlapped approximately 2″ to 4″ at the 6 o’clock position. Pads are secured in place with monofilament tape or nonmetallic strapping. Pads are placed in this manner along the length of the pipe with an edge overlap of 1″ to 2″.

The third method of installing TUFF-N-NUFF is spiral wrapping. TUFF-N-NUFF can be purchased in roll form and spiral wrapped around the pipe by hand or with a spiral wrap tape machine.

Advice to Installers

Installers should be advised of the following:

  1. Cigarette wrap custom ROLLS for pipelines up to 20″ in diameter.
  2. For larger pipelines, custom PADS may be strapped around pipe with filament tape or appropriate non-metallic substitute.
  3. Recommend overlap should be at bottom of pipe or shiplap down to avoid separation during backfill.
  4. Backfill should follow the installation of pads within a reasonable time.

Installation Videos

Video of Pipeline Rock Shield Pad Installation

Video of Pipeline Rock Shield Roll Installation

Tuff-N-Nuff Rock Shield

Tuff-N-Nuff® Pipeline Rock Shield

Additional information

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Additional information

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