INSULTECH

High Temperature STEAM 800º to 1100ºF

Piping
& Equip.

Application
•Multistage Steam Turbines • Piping • Main Steam Stop Valves • In-Line Flanges

Market
• Utility Power Plants • Cogeneration

Design Components:

Blanket Thickness Surface Temperature Reference:

Temperature Range

Thickness

800ºF (427ºC) to 950ºF (510ºC)

4"

951ºF (511ºC) to 1100ºF (593ºC)

5"

Fabrication Requirements

Blanket Construction
Construction shall be a stapled construction. Outer jacket materials will be drawn out, to match at the inner jacket edge. Material will be folded under and stapled with 3/8" Monel bevel point staples at the seam. Staples are to follow the inner jacket edge with at most 1" spacing between staples. A stainless steel hog ring cannot be used as a substitute to the staple. Spacing will remain 1" on center.

Blanket Overlap
Blanket design will encase the unit to be insulated and if possible a minimum 4" overlap will extend beyond mating flanges. Where feasible, insulation will overlap mating flanges. If overlapping is not possible, blanket insulation will butt up to the adjoining surface. The Second Layer Blankets will overlap the first layer blankets a minimum of 6" where possible. This will ensure minimal "hot spot" potential.

Assembly Drawing Requirement
Each blanket insulation project will include an instruction package shipped with the blanket material. This package will include Assembly Drawings identifying piece location, a Material List of all pieces and Instructions for Installation on how blanket insulation will be installed. The latest and most accurate records must be kept by the supplier on a CAD file for a minimum of ten years to assure re-orders and replacement.

ID Plates
For easy identification and location, a stainless steel or aluminum name plate tag is riveted to each blanket piece. 1/8" Embossed lettering shows location, description, size, pressure rating and tag number sequence.

Quilting Pins
To enhance blanket quality and maintain uniform thickness, stainless steel tufts or pins will be placed at random locations no greater than 18" apart. This will prevent shifting of the insulation filler.

Blanket Insulation Weight
Blanket design will conform to the equipment surface with minimized air void. The total number of pieces will be minimized. Any one piece will not exceed 50lbs. in weight. Designs will minimize installation time as well as removal time.

Standard Fastener
Blanket insulation will accommodate the following fastening option. A 20 gauge stainless steel wire will be doubled up and twisted in a spiral fashion with a minimum of 4 twists per inch. Wiretwist length will be 16" or greater. The Wiretwist will be secured to the lacing pin at the pin stem. Lacing pin stems will be 14 gauge.

Project Qualifications
All items to be insulated will require a field takeoff prior to bid submittal, and must be reviewed for proper cost estimation. Upon receipt of project contract, each and every item must be accurately measured for retrofitting to existing field conditions and tagged with an aluminum or stainless steel identification tag showing an item number for installation reference. At the time of installation, blankets must have a corresponding item number shown on the blanket tag and must match to existing tagging on fitting. No standard blanket designs will be accepted. This will assure good thermal performance.

Warranties
All blankets will carry an 18 month warranty. This warranty will cover the replacement cost of the blanket. This warranty will cover blanket failure due to premature degradation from either blanket components used in the blanket, the blanket design construction or workmanship.

Design Construction Sample
Upon bid submittal a blanket design construction sample must be presented for review and product approval. 12" by 18" Samples will be required and must identify all characteristics mentioned in the above fabrication requirements. Any deviations from the above stated requirements may result in rejection.

Design Guidelines
To access the true limitations of this recommended design, refer to the technical data sheets on each product component. Following these guidelines will produce the highest achievable service life. Blanket design quality can be reduced or enhanced by changing any one component. If a question arises regarding deviations from those stated guidelines, please contact your regional representative or call Shannon direct.