industrial pipe marking - completeplumbingsource.com
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Industrial Pipe Marking Pipe and Valve Identification
Specialists
SPECIFICATIONS
ASME (ANSI) Standard A13.1-2007
The ASME (ANSI) Standard for pipe identification is a widely used guideline in determining pipe
identification requirements. The purpose of the standard is to "assist in identification of hazardous
materials conveyed in piping systems and their hazards when released into the environment." "Pipes
are defined as conduits for the transport of gases, liquids, semi-liquids or fine particulate dust."
Supports, brackets and/or other accessories are specifically excluded from the application of this
standard.
Methods of Identification Pipe marking
Plastic pipe marking
Engraved Plastic Laminate Signs
Stencil
Valve Tags
Utility Marking Tape
Pipe Marking
-Identify your pipes with self-adhesive pipe markers.
-Pipe labels can be invaluable in an emergency situation, and will also help you comply with A13.1
standards.
-Adjust size of marker and letters to accommodate the outside diameter, including insulation, of the
pipe identified. Follow the guidelines published in ANSI A13.1 for marker/lettering size and color.
-Lettering: Include standard preprinted nomenclature that best describes piping system in each
instance, for review by the Architect/Engineer/owner.
-Pipe marker with arrows indicate direction of flow, either integrally with piping system service
lettering (to accommodate both directions), or as a separate unit of plastic.
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Plastic Pipe Marking -Snap-on or strap-on type vinyl markers with integral flow arrows and factory applied graphics.
-No tape or adhesives necessary and no need to clean or degrease pipes.
-Arrows are included on every marker and each marker is reversible so
you don't need to know the flow direction before you order.
-UV resistant inks and heavy vinyl withstand harsh environments.
Engraved Plastic Laminate Signs
-Provide 1/8” thick plastic laminate engraved with 1/4” high letters, block font, black with white core
(letter color). Approximate size: 4-1/2" x 6", or as required to accommodate lettering.
-Wording shall indicate device identification number and description.
-Attach with stainless steel screws or contact type permanent adhesive where screws should not
penetrate the substrate
Stencil Painted Identification Materials
Types of Stencils
Fiberboard Stencil
Mylar Plastic Stencil
DuraLast: PVC Stencil
Brass Stencil
Stencil Paint
Standard exterior type stenciling enamel; black,
except as otherwise indicated; either brushing
grade or pressurized spray-can form and grade.
-Standard stencils, prepared for required applications with letter sizes generally complying with
recommendations of ANSI A13.1 for piping and similar applications but not less than 1-1/4" high
letters for ductwork and not less than 3/4“ high letters for access door signs and similar operational
instructions.
Valve Tags Plastic Tags
Standard 1-1/2” – 2” diameter, 3/32" gauge.
Economical and very easy to use.
Chemical and weather resistant.
Customize and color-code on the spot.
Have a smooth write-on surface.
Not recommended for outdoor use.
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Brass Valve Tags
Standard 1-1/2” – 2” diameter, 19” gauge.
Withstand high temperatures up to 1200 degrees Fahrenheit.
Relatively inexpensive while providing sufficient stability.
Aluminum Tags
Standard 1-1/2” – 2” diameter 18” gauge.
Withstand high temperatures up to 1500 degrees Fahrenheit.
Impervious to moisture and will not rust.
Designed to survive in harsh environments.
Stainless Steel Tags
Standard 1-1/2” – 2” diameter, 20” gauge.
Withstand about 2700 degrees Fahrenheit.
Completely rust resistant.
Very strong and can survive in extreme environments.
Utility Marking Tape -Alerts excavators that buried utility lines are present.
-Underground Warning Tapes come in non detectable polyethylene styles or detectable (metallic
tape) that can be located with a metal detector and shall continuously identify the pipe with big,
bold, black lettering.
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ADDITIONAL INFORMATION
Piping System Identification
As a minimum, locate pipe markers as follows:
Provide a pipe marker at each valve to
indicate proper identification of pipe
contents. Where several valves exist on one
(1) header, it is necessary to mark only the
header.
Every 25 feet in exposed and concealed
areas on all piping systems. Provide at least
one (1) pipe marker in each room on all
piping systems.
At each branch or riser take off on piping
systems, excluding short takeoffs for fixtures
and terminal units.
Provide a pipe marker and an arrow marker
at every point of pipe entry or exit where the
pipe penetrates a wall, floor, service column
or enclosure.
At access doors, manholes and similar access
points that permit view of concealed piping.
Near major equipment items and other points of
origination and termination.
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ASME (ANSI) Color Recommendations -Unmarked pipes mean danger - to both life and property. Numerous injuries have occurred through
ignorance of pipe contents, particularly when outside agencies are called in under emergency
conditions.
-Safety Color Code, ANSI Z535.1
ASME (ANSI) Size Recommendations -The A13.1-2007 standard also makes recommendations as to the size of letter height and length of
color field for various pipe diameters.
-These recommendations are shown in the table.
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Mechanical Equipment Identification
-Install an engraved plastic laminate sign on or near each major item of mechanical equipment.
1. Main control and operating valves, including safety devices
2. Meters, gauges, thermometers and similar units
3. Fuel-burning units including boilers, furnaces, and heaters
4. Pumps, compressors, chillers, condensers and similar motor-driven units
5. Heat exchangers, coils, evaporators, cooling towers, heat recovery units and similar
equipment
6. Fans, blowers, primary balancing dampers and VAV boxes
7. HVAC central-station and zone-type units
8. Tanks and pressure vessels
9. Air conditioning indoor and outdoor units
10. AFD's and transmitters and Control Boxes
11. Other items as specified by Project Manager
Underground Pipe Identification
Burial Depths:
Maximum detectable burial range is as follows:
-Install pipe identification tape 12" above all underground pipe installations.
-Install 2"wide tape for pipe ≤ 24" deep; 6"wide tape for pipe > 24“ deep.
Color Code:
Blue Water & Associated Lines
Brown Force Mains & Associated Lines
Green Sanitary & Associated Lines
Orange Telecommunications & Telephone Lines
Purple Reclaimed Water Lines
Yellow Gas & Associated Lines
Red Electric & Associated Lines
Ductwork Identification
-Identify air supply, return, exhaust, intake, and relief ductwork with stenciled signs and arrows,
showing ductwork service and direction of flow, in black or white (whichever provides most contrast
with ductwork color).
-Label all ducts in mechanical equipment rooms and in congested corridors when concealed by ceilings.
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MATERIAL SPECIFICATIONS
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COMMONLY ASKED QUESTIONS
-Can I still use my current pipe marking system based on the older version of the standard or do I
have to change my color scheme to meet ASME A13.1 2007?
Existing schemes for identification shall be considered as meeting the requirements of the
standard if the schemes are described in writing and employees are trained in the operation
and hazards of the piping system.
-What if I have a pipe smaller than 3/4" diameter?
For pipes of less than 3/4" in diameter the use of a permanently legible tag is recommended.
-Are particular shades of yellow, green, red and blue required for pipe labels?
Yes, ANSI/ASME A13.1- recommends the color code featured in the ANSI Z53.1- Safety Color
Code for Marking Physical Hazards. The color shades recommended are intended to give
highest level of recognition to employees with both normal and color-deficient vision.
-Has this ANSI pipe marking standard been adopted by OSHA?
No, it is still considered an industry consensus standard, which is only a recommendation.
Even though it has not been specifically adopted by OSHA, industry consensus standards may
be evidence that a hazard is recognized and there is a feasible means of correcting such a
hazard. If you do not follow a consensus standard, it is possible to be cited under the General
Duty Clause.
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