Pipe and Fitting Insulation

Saving Energy and Improving the Factory Environment


A wide range of factories have extensive networks of piping systems carrying hot fluids.  Piping configurations may have hundreds of exposed fittings, such as tees, unions, valves, flanges, gauge stations and larger elements such as turbines, tanks and heat exchangers. These industries may include plastics, food processing, petrochemicals, commercial laundries, paper and pulp, metal treatment and many others. Hot pipes and associated fittings may carry steam, condensate, hot water, process fluids or hot manufactured liquid products.


Insulation Deficiencies

In most cases the piping is at least partially insulated, though sometimes even that insulation is inadequate or has become damaged. Commonly though, many fittings are not insulated or were given only an initial wrap or spray insulation treatment. Often that initial insulation was removed when the device first needed service and was not replaced. This may be because qualified personnel  from local commercial insulators are not readily available or are perceived to be too costly for small repair jobs.  Or it may simply be the perception that frequent access will be needed and insulation will get in the way.

Inadequate insulation on fittings, tanks and other equipment can result in very high  energy losses and may cost the plant tens or even hundreds of thousands of dollars annually. Further, exposed hot surfaces can represent a safety hazard to workers and may create excessively noisy or uncomfortable working conditions. With the right insulation, these problems are eliminated. Today, industrial insulation specialists offer custom products that can be fitted to nearly every device and fitting. Custom blanket insulation can be quickly removed for access to the fitting, and can be just as quickly replaced.


Large Field for Improvement

Mellanie Askew represents Coverflex Mfg. Inc., a major industrial insulation manufacturer. According to Askew, removable insulation products are made of various types of fiberglass materials, and can be installed on nearly all fittings and many other problem areas. She comments, “It seems like there is a lot of under-insulated equipment and piping. We estimate that 10-30% of all installed mechanical insulation is either damaged or missing.” This does not include devices that were never insulated in the first place.

She points out that it is often important for insulation blankets to be removable for inspection or service. “Our Coverflex blankets have fastening systems using stainless steel buckles, D-rings and straps, Velcro fasteners or stainless tie wire. All can easily be removed and reinstalled with no special tools.”


Short Payback
for Insulation Investment

Askew notes that insulation additions or repair projects often have paybacks of less than a year. She cites an example of a six-inch steam valve that operates at 350°F and is uninsulated. It has a fuel cost for lost steam energy as high as $880 per year. That same valve if insulated with two inches of high-temperature insulation would reduce the energy lost by 95%, a savings of as much as $800 annually, and a ten-year savings of $8,000.

She adds that in addition to the energy cost savings, adding insulation provides personnel protection, prevents moisture condensation, maintains product termperatures, reduces combustion emissions and adds fire protection. “All of this is in addition to an excellent return on investment.”

The advantages of removable and replaceable insulation are many. Arnold Mazurkiewicz from Shannon Enterprises was a recent presenter at a Technology & Market Assessment Forum sponsored by the Energy Solutions Center. His firm specializes in the installation of Insultech® blanket insulation products.


Access Needed to Fittings

He points out the disadvantages of conventional wrap or spray insulation on industrial pipe fittings. “These are complex surfaces and quick access is needed. Each time conventional insulation is removed, a contractor has to be brought in to replace it.” Further, he explains that conventional insulation may not hold up to field conditions of moisture, temperature or steam leaks. “The end result is a neglected surface condition.”

The solution is custom, removable blanket insulation designed to withstand high temperatures. According to Mazurkiewicz, the typical industrial facility that uses steam has 250 exposed fittings, with an energy loss of $75,000 per year. “The average opportunity for annual savings here is $68,000.” He notes that the typical return on investment ranges from 4 to 14 months. “Remove and reinstall the insulation just once and you are ahead.”


Custom Designed for Each Device

Custom blanket insulation is designed for each specific device, with correct match-up around the valve bonnet, and correct overlap with adjacent pipe or fitting insulation. For installations where there might be condensation or liquid leaks, the insulation usually has a drip grommet so liquid does not accumulate inside the blanket and any leaks can be quickly spotted. Exterior blanket surfaces are often Teflon-coated fabric for easy cleaning and resistance to high temperatures.

Mazurkiewicz and Askew both emphasize the importance of a complete insulation energy appraisal of the industrial facility to determine areas needing attention.  The appraisal puts actual dollar savings to Btu losses as well as calculating potential reductions in emissions of greenhouse gases. The appraisal is based on data supplied by the plant or energy manager and gathered during a facility walk-through.  This data is fed to a computer program that calculates energy savings on an annual basis.


Infrared Technology Used to Identify Targets

According to Mazurkiewicz, an infrared gun or camera is normally used to obtain surface temperatures and each fitting examined is also tagged for identification. The blanket insulation supplier can then design removable wraps for each fitting. Usually a follow-up infrared survey is done to verify the results of the insulation project.

Gary Orlove is an Application Engineer and Curriculum Manager at the Infrared Training Center of FLIR Systems Inc., a major manufacturer of infrared sensing equipment. He notes that there is widespread acceptance and growing use of infrared systems for determining and measuring the need for insulation in industrial facilities. He points out that interpretation of infrared sensing results must be done by a qualified person. He explains, “If the industrial owner has taken training in use and interpretation of IR images, then he can do this himself, otherwise it is best to use an outside specialist.”


Time to Get Started

With a comprehensive facility review and a program of insulating all pipes and fittings with modern insulating products, major savings in plant energy use are achievable. Further, the facility will be quieter, dryer and safer. If your plant has not done such a systematic insulation review, now is the time. Let the savings begin.              

Top Plant
The Top Plant program honors outstanding manufacturing facilities in North America.
Product of the Year
The Product of the Year program recognizes products newly released in the manufacturing industries.
System Integrator of the Year
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
June 2018
2018 Lubrication Guide, Motor and maintenance management, Control system migration
May 2018
Electrical standards, robots and Lean manufacturing, and how an aluminum packaging plant is helping community growth.
April 2018
2017 Product of the Year winners, retrofitting a press, IMTS and Hannover Messe preview, natural refrigerants, testing steam traps
June 2018
Machine learning, produced water benefits, programming cavity pumps
April 2018
ROVs, rigs, and the real time; wellsite valve manifolds; AI on a chip; analytics use for pipelines
February 2018
Focus on power systems, process safety, electrical and power systems, edge computing in the oil & gas industry
Spring 2018
Burners for heat-treating furnaces, CHP, dryers, gas humidification, and more
April 2018
Implementing a DCS, stepper motors, intelligent motion control, remote monitoring of irrigation systems
February 2018
Setting internal automation standards

Annual Salary Survey

After two years of economic concerns, manufacturing leaders once again have homed in on the single biggest issue facing their operations:

It's the workers—or more specifically, the lack of workers.

The 2017 Plant Engineering Salary Survey looks at not just what plant managers make, but what they think. As they look across their plants today, plant managers say they don’t have the operational depth to take on the new technologies and new challenges of global manufacturing.

Read more: 2017 Salary Survey

The Maintenance and Reliability Coach's blog
Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
One Voice for Manufacturing
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Maintenance and Reliability Professionals Blog
The Society for Maintenance and Reliability Professionals an organization devoted...
Machine Safety
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
Research Analyst Blog
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Marshall on Maintenance
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
Lachance on CMMS
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
Electrical Safety Update
This digital report explains how plant engineers need to take greater care when it comes to electrical safety incidents on the plant floor.
Maintenance & Safety
The maintenance journey has been a long, slow trek for most manufacturers and has gone from preventive maintenance to predictive maintenance.
IIoT: Machines, Equipment, & Asset Management
Articles in this digital report highlight technologies that enable Industrial Internet of Things, IIoT-related products and strategies.
Randy Steele
Maintenance Manager; California Oils Corp.
Matthew J. Woo, PE, RCDD, LEED AP BD+C
Associate, Electrical Engineering; Wood Harbinger
Randy Oliver
Control Systems Engineer; Robert Bosch Corp.
Data Centers: Impacts of Climate and Cooling Technology
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
Safety First: Arc Flash 101
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
Critical Power: Hospital Electrical Systems
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me