PRODUCT DATA SHEET
EL-MW-SR- · REV 1 · Jul 2026
Elbows · Mineral Wool
Mineral Wool SR
BRAND: Johns ManvilleSKU FAMILY: EL-MW-SR-1 STOCKED SIZE
Short-radius mitered mineral wool fitting insulation for 90° ells on hot lines to 1200°F.
AT A GLANCE
Max service temp1200°F
FormMitered/segmented elbow (short radius)
Thickness range2"
FacingNone
StandardASTM C547
Flame / smoke5 / 0 (ASTM E84 / UL 723)
TECHNICAL DATAPER MANUFACTURER
| Standard / specification | ASTM C547 Types I, II, IV |
| Thermal conductivity (k) | 0.22 @ 75°F |
| Water-vapor sorption | <1% by wt (ASTM C1104) |
| Combustibility | Non-combustible per ISO 1182 |
APPLICATIONS
- Steam and hot process elbows
- Tight-radius fittings
- Power and industrial fittings
THERMAL CONDUCTIVITY — K VS. MEAN TEMPBTU·IN/HR·FT²·°F
| Mean °F | 75 | 200 | 300 | 400 | 500 |
|---|
| k value | 0.22 | 0.28 | 0.34 | 0.4 | 0.48 |
STOCKED SIZES & SKUS1 SIZES
| SKU | NOM. SIZE | WALL / 2ND |
|---|
| EL-MW-SR-90-400-200 | 4" | 2" |
FEATURES
- Rated to 1200°F
- Water-repellent binder
- Non-combustible
- Short-radius pattern
PACKAGING & HANDLING
| Packaging | Segmented sets, cartoned |
| Handling & storage | Keep dry; store indoors; water-repellent but protect from standing water |
CONTRACTORS ALSO ORDER
Aluminum JacketingStainless Steel BandingWing SealsStainless Steel Tie Wire
Data shown is nominal and per the manufacturer's published literature; verify against the current submittal and SDS before specifying. Sun City Energy Supplies stocks to spec, fabricates to size, and returns quotes the same business day. Informational only — not a warranty of fitness for a particular purpose.