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dataPARC
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Control Valves
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Triple Offset Valves
Butterfly Valves
Ball Valves
Gate Valves
Globe Valves
Check Valves
Angle Valves
Lined Valves
Knife Gate Valves
Isolation Valves
Back
Pressure Management
Regulators
Pressure Relief & Safety Valves
Flame and Detonation Arrestors
Tank Vents and Hatches
Bulk Storage and Transport Equipment
Steam Traps
Pressure Management
Back
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Digital Valve Controllers
Discrete Valve Controllers
Level Sensors and Controllers
Configuration & Diagnostic Software
Positioners
Pneumatic Pressure Controllers
Transducers
Controllers Instruments Accessories
Switches & Position Sensors
Accessory Valves
Boiler Level Instrumentation
Jet Pumps / Eductors
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Back
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Pneumatic Actuators
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Safety Instrumented Systems
SCADA Systems
BioReactor Control Systems
Control and Safety Systems
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Machinery Health Management
Asset Monitoring
Field Device Management
Operations Analytics
Asset Reliability
Back
Operations and Business Management
Manufacturing Execution Systems
Midstream Oil and Gas Applications
Reservoir Management Software
Upstream Oil and Gas Applications
Digital Twin Software
Operations and Business Management
Back
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Air Preparation
Cylinders & Actuators
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Back
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Products
Integrated Solutions
Temperature Measurement
Thermowells
Rosemount™ 91 Thermowell (Obsolete)
Overview
This product is now obsolete.
Relevant documents and drawings are listed below.
Contact your local Emerson representative for your measurement needs.
Rosemount™ 91 Thermowell (Obsolete)
Specs
Thermowell Calculations
Wake frequency calculation (WFC) performed by certified engineers, order R21 for official report
Certifications/Approvals
Material certification, NACE, CRN (see full specs for complete list of certifications)
Product Tests
External pressure test, internal pressure test, dye penetration test
Resources
All
Data Sheets & Bulletins
Drawings & Schematics
White Papers
PDF
Size: 3.6mb
Data Sheets & Bulletins
Product Data Sheet: Volume 1 Temperature Sensors and Accessories (English) | Rosemount
ZIP
Size: 87kb
Drawings & Schematics
Type 1 Drawing: Rosemount 91 Thermowell, 2D DXF
PDF
Size: 151kb
Drawings & Schematics
Type 1 Drawing: Rosemount 91 Thermowell, 2D PDF
PDF
Size: 196kb
Drawings & Schematics
Type 1 Drawing: Rosemount 91 Thermowell, 3D PDF
ZIP
Size: 11kb
Drawings & Schematics
Type 1 Drawing: Rosemount 91 Thermowell, 3D SAT
ZIP
Size: 10kb
Drawings & Schematics
Type 1 Drawing: Rosemount 91 Thermowell, 3D STP
PDF
Size: 89kb
White Papers
Technical Note: Tubular Thermowell Best Practices | Rosemount
PDF
Size: 74kb
White Papers
White Paper: Velocity Collars: No Longer Best Engineering Practice | Rosemount
Features
Available in threaded, flanged, welded or sanitary mounting styles for application flexibility
Straight, tapered or stepped stem profiles to meet process requirements
Large selection of thermowell materials to ensure compatibility with the process and process piping
Optional Wake Frequency Calculation report verifies process compatibility
Available with NACE approval to meet MR0175/ISO 15156 and MR0103 requirements for sour gas applications
External pressure test option confirms structural quality and checks for leaks at thermowell connection and stem