Removable Insulation Blankets in Arlington, TX and the DFW Metroplex

Anything that gets opened, inspected or serviced: gate and globe valves, control valves, flange pairs, strainers, manways, heat exchanger heads and channel covers, pump casings, expansion joints and autoclave doors. If maintenance touches it twice a year, hard insulation is the wrong answer — a removable cover is.

They also solve the access problem on otherwise hard-insulated systems. On a pipe run we hard-insulate the straight pipe and sew blankets for the valves, so the run stays sealed and the valves stay serviceable. Same logic on a tank: fixed insulation on the shell, removable covers on the manway and nozzles.

A bare 6-inch gate valve loses about as much heat as four to five feet of bare pipe of the same size — all that cast body and bolted flange is surface area, and at steam temperature every square foot of bare steel sheds roughly 780 Btu per hour. A boiler room with a dozen naked valves is quietly running an extra burner.

A fitted cover recovers about 85 percent of that loss. Real numbers: a dozen 6-inch valve covers on 350°F lines running around the clock save on the order of $5,400 a year. The set costs about $4,800–7,700, so payback lands near 14 months — faster on hotter lines and on valves that dump heat into an air-conditioned space.

There is a safety line item too. A valve at 350°F is an injury waiting at hand height; the industry design target for touchable surfaces is about 140°F per ASTM C1055, and a cover gets the surface there.

The shell is silicone-coated fiberglass cloth — it sheds water and oil, takes plant abuse, and handles the heat. Inside goes high-temperature needled insulation blanket, sized to the service temperature. Where the hot face needs it — steam traps, superheated lines, anything with sharp studs or bolt heads — we line the inside with stainless steel mesh so the blanket survives being dragged over the hardware for years.

Closure is D-rings with lacing wire, or straps and buckles where the crew prefers them. Either way the cover cinches tight to the body with no chimney gaps at the stem or flanges — a loose cover with air moving through it gives back a big share of the savings.

Every cover is patterned from measurements we take on your valve, not picked from a catalog of approximate sizes. Sewing custom covers is the same bench work CJM has always done — measure the odd shape, pattern it, build it to fit the first time.

Hard insulation is cheaper per square foot and seals better on things that never open — that is why straight pipe gets sections and jacket, not blankets. But on a valve, hard insulation dies at the first repack: the mechanic cuts it off, the jacket goes in the scrap bin, and the valve stays bare until someone budgets to re-insulate it. Usually nobody does.

A removable cover breaks that cycle. It comes off in a minute or two by hand, sits on the floor during the work, and goes back on the same shift — no insulation contractor, no purchase order, no bare valve for the next five years. The full comparison is in removable vs. permanent insulation.

Per cover, by line size: valves on 1–3 inch pipe run $220–460, 4-inch $320–520, 6-inch $400–640, 8-inch $480–760, and 12-inch $620–980. Odd shapes — exchanger heads, manways, pump casings — price by the pattern, in the same range for comparable surface area. Small orders carry the shop's $1,500 job minimum.

The count is the part people get wrong, so we do it for you. On the free walk-down we tag and count every bare valve and fitting, shoot each one with the IR gun, and hand you a written estimate within 24 hours — a per-cover list you can rank by payback, not a lump sum. Or get ahead of us and run your count through the calculator first.