Mineral Wool V-Grooved Pipe Insulation

Same great performance. Lower costs and reduced carbon emissions.
JM gives you options. We manufacture two flat-shipped, v-grooved industrial pipe insulations that deliver the same excellent thermal performance as our mandrel-wound insulation. Because these v-grooved insulations are shipped flat, they can help you cut transportation costs and reduce carbon emissions.

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All our MinWool-1200^® insulation products require about the same amount of time and labor to install. And all of these products can ultimately pay for themselves in heat savings and carbon reduction over the life of the product.

MinWool-1200^® Pipe vs. Field-Formed Pipe
Compare the installation differences

Limited jobsite storage can make any project a logistical challenge. JM’s MinWool-1200^® Field-Formed and Precision Cut Pipe Insulation ships flat to the jobsite and is easily and quickly transformed into round, hinged pipe sections.

How quickly? Watch the video now to see a head-to-head comparison of the installation time for both materials.

Download the Product Data Sheets:
MinWool-1200^® Field-Formed Pipe | MinWool-1200® Precision Cut

Frequently Asked Questions

From specification to installation, we’ll help you find the answers to frequently asked MinWool-1200^® Pipe Insulation questions.

Johns Manville manufactures four types of MinWool-1200 pipe insulation:
1. MinWool-1200^® Pipe Insulation (mandrel-wound)
2. MinWool-1200^® Preformed Pipe (v-grooved)
3. MinWool-1200^® Field-Formed Pipe Insulation (v-grooved, flat-shipped)
4. MinWool-1200^® Precision Cut Pipe Insulation (v-grooved, flat-shipped)

This FAQ will help answer some common questions about these four products and help you choose the right pipe insulation for your specific job.

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1. How do the two v-grooved, flat-shipped MinWool-1200® products perform compared with mandrel-wound?

Our v-grooved and mandrel-wound MinWool-1200^® pipe insulations are all included under the ASTM C547 Specification for Mineral Fiber Pipe Insulation. The required performance is the same for all of our MinWool-1200^® products.

2. Are all of these MinWool-1200® pipe insulation products water-repellent?

All MinWool-1200^® products that Johns Manville manufactures are water-repellent, including our mandrel-wound and v-grooved pipe insulations.

3. Which of the MinWool-1200® pipe insulation options are the easiest to install and why?

We’ve done timed installations and gathered feedback from contractors over the years and everyone agrees that there is no real difference in the amount of time or effort required to install mandrel wound and v-grooved pipe insulations.

4. Do v-grooved insulations save space?

Yes, if they are shipped flat. MinWool-1200^® Field-Formed Pipe Insulation and MinWool-1200® Precision Cut Pipe Insulation are both shipped flat, so you can fit more product on each truck and save significant storage space at the job site.

5. What is the difference between MinWool-1200® Field-Formed and MinWool-1200® Precision Cut?

These two products are both v-grooved pipe insulations and both are shipped flat, which means you can fit more product on each truck and save space on the job site. The Field-Formed product includes adhesive in the v-groves. The Precision Cut product does not have adhesive in the grooves.

6. Do I need to add adhesive to the MinWool-1200® Precision Cut insulation when it’s being installed?

No. Precision Cut insulation freely conforms to the pipe and the grooves close during installation. The Precision Cut insulation should be taped or wired to the pipe prior to installing the jacketing, just like you do with other mineral fiber pipe insulations.

7. Will v-grooved insulations create a "stop-sign" effect after the weather protection metal jacketing is installed?

No. A stop sign effect, which is when the insulation forms an octagonal shape rather than a smooth circle, is no longer a concern in industrial pipe insulation. This issue occurred years ago, when the metal jacketing used was thinner than it is today. ASTM C1729, the specification for aluminum jacketing for industrial pipes, now specifies jacket thicknesses that have eliminated this issue.

8. Do the grooves in v-grooved insulations close all the way?

Yes. Johns Manville v-grooved insulations are precision-made for specific pipe sizes and thicknesses, so they close completely around the pipe.

9. Where do you manufacture v-grooved pipe insulation?

We manufacture v-grooved pipe insulation in the Johns Manville Phenix City, AL plant.

10. Can I order mixed truckloads of v-grooved pipe insulation out of Phenix City?

Yes. You can order mixed truckloads that combine our three variations of v-grooved MinWool-1200^® insulations, MinWool-1200^® mandrel-wound pipe insulation, MinWool-1200^® Industrial Board, MinWool-1200^® Pipe and Tank Wrap, and MinWool-1200^® Lamella Tank Wrap.

11. Can I get v-grooved MinWool-1200® pipe insulation from my local distributor?

Johns Manville v-grooved pipe insulations are available from local JM industrial insulation distributors.

12. Which of Johns Manville’s pipe insulations require a heat-up schedule?

MinWool-1200^®Pipe Insulation (mandrel-wound) (ASTM C547, Type II, Grade A) and MinWool-1200^® Precision Cut pipe insulation (ASTM C 547 Type III, Grade A) do not require a heat up schedule. MinWool-1200^® Field Formed insulation meets ASTM C547, Type III, Grade B and requires a heat-up schedule.

13. What language should be used when specifying v-grooved mineral wool pipe insulation?

Mineral wool pipe insulation should meet ASTM C547, Types I, II and III.

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