Thermowells. Excellence the World can Measure TM. Temperature Products. Fabricated - Screwed & Flanged Connection. General Description.

Transcription

1 Thermowells abricated - Screwed & langed onnection Temperature Products ata sheet : TWELL2/2012 y Wide Range of Materials - Stainless Steels - Exotic Materials y hoice of Process onnections - langed - Screwed - Weld-In y Manufactured from or Tube y ASME IX oded Welding y Special oatings y Non estructive Testing General escription abricated thermowells are precision components manufactured to the highest standard from pipe, tube and bar, to serve as protective devices for primary sensing elements of all types. A wide range of possible products are available. onditions of pressure, temperature, velocity and corrosion resistance govern the size, shape and selection of materials to ensure optimum dependability, response time and accuracy. Specification Materials We are experienced in the manufacture of fabricated pockets in a wide range of materials, including 304, 310, 316 and 321 Stainless Steels, 446 r-e, 6% Mo, Haynes Alloys 214, 230, 556 and HR-160, arbon Steels, hromium Steels, uplex and Super uplex Stainless Steels, Hastelloy 3, 22, 276 and X, Incoloy 800, 825, Inconel 600 and 625, Monel 400 and Titanium. Some suggested materials for various temperatures are shown in the chart below. Instrument onnection Instrument connections may be male or female, in API, NPT, SP or other thread forms. Process onnection onnection to the pipe or vessel may be by means of thread or flange. Threaded onnection Using standard tapered or parallel pipe threads for simplicity and low cost is popular, generally for low pressure applications. Standard threads are NPT, SP(Pl), SP(Tr) and API. The thread size is dependent on the application, but ¾ and 1 are common. langed onnection All sizes and pressure ratings are available to IN, S, ANSI/ASME and JIS or other standards. langed connections are now the petrochemical standard for all applications. Pocket Size We can fabricate pockets from a wide variety of tube or pipe sizes including 11 mm x 7 mm, ¼ N, ½ N, ¾ N, 1 N and larger, in a variety of schedules subject to requirements and process conditions. Reduced Tip or applications where a quick response to changes in temperature is required, fabricated pockets may be fitted with a reduced tip. The tip is machined from bar-stock, with a bore suited to the primary element, minimising the amount of free air space around the sensor. Excellence the World can Measure TM

2 Thermowell Types (Table 1) ode Type imensions 23mm Parallel Thread E abricated Screwed Taper Thread 23mm abricated langed

3 abricated Thermowell Type (Screwed Thermowells) (Table 2) ode Type Tube imensions 23mm Parallel Thread - A Sliding ush 1/2 11 x 7mm Taper Thread - 12mm Parallel Thread - Running Nipple 1/2 11 x 7mm Taper Thread - 12mm Parallel Thread - Threaded 1/2-30mm Taper Thread - A T Taper Thread - 40mm emale Hex ar 1/2 - Parallel Thread -

4 abricated Thermowell Type (langedthermowells) (Table 2) ode Type Tube imensions 23mm A Sliding ush 1/2 11 x 7mm 12mm Running Nipple 1/2 11 x 7mm 12mm Threaded 1/2-30mm Thread Type emale Hex ar 1/2 -

5 Tube / Size (Table 3) ode Tube Outer iameter (O) Inner iameter (I) Wall Thickness 11.0 x 7.0 mm 11.0 mm 7.0 mm 4.0mm I 12.7mm x 9.5 mm 12.7mm 9.5mm 3.2mm O Size ANSI- American National Standards Institute ode Outer iameter (O) Inner iameter (I) Schedule Wall Thickness 1/2 Nominal ore Inch Inch Inch G Inch Inch Inch I O Instrument onnection (Table 4) ode Type Size (Inch) Male / emale A 04 04E SP NPT SPT SP NPT SPT 1/2 emale 1/2 Male Process onnection (Screwed Type) (Table 5) ode Type Size (Inch) 04A imension (mm) A Round (mm) ar Size Hex (inch) 1/ A 3/ A SP A 1 1/ / / / NPT / / E 1/ E 3/ E SPT E 1 1/ E 1 1/ A T

6 lange Type (Table 6) illet Welded lange Most common type of weld. The fillet weld is used to join two pieces at a 90-degree angle. A fillet weld is produced by running a weld bead at a 45-degree angle to a 90-degree corner; it resembles a triangle when viewed from the side. The weld is used to fill the area where two pieces of steel meet, hence the name fillet weld. The depth of the penetration, as in all welds, determines the strength of the fillet weld. Loose backing lange & Stub lange When using exotic material, it is not necessary for the whole flange to be the same material. or economic reasons a typical 3mm thick flange with a diameter equal to the raised face is used. This is welded to the thermowell stem and supplied fitted with a loose backing flange normally manufactured in 316 Stainless Steel or carbon steel. lange Size / Rating (Table 7) ode lange Size W Rating 1/2 1/4 11 x 7mm Tube 12.7 x 9.5mm A lb. ü ü ü ü lb. ü ü ü ü lb. ü û û û lb. ü ü ü ü E lb. ü ü ü ü lb. ü û û û J lb. ü ü ü ü K lb. ü ü ü ü L lb. ü û û û Raised ace lange acing W Image The Raised ace flange is the most common type used in process plant applications,. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types. The purpose of a R flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint. iameter and height are in ASME 16.5 defined, by pressure class and diameter. Pressure rating of the flange determines the height of the raised face. The typical flange face finish for ASME 16.5 R flanges is 125 to 250 µin Ra (3 to 6 µm Ra).

7 Order ode - abricated Thermowell - Screwed onnection abricated Thermowell abricated E Type (Table 2) Sliding ush Running Nipple Threaded emale Hex bar A Tube / Size (Table 3) 11.0 x 7.0mm 1/2 Nominal ore Schedule 40 1/2 Nominal ore Schedule 80 G Material 316 Stainless Steel 316L Stainless Steel Other (State requirement) XXX Tip Type End ap Reduced Tip R Instrument onnection (Table 4) Enter ode from table Process onnection (Table 5) Enter ode from table Lagging Extension T Enter length in mm (Maximum 100mm) * Enter length in mm (Minimum 90mm Maximum 1200mm) *Note: Immersion length U measurements on taper threads are taken from below the process connection thread & above the process connection thread on parallel connections. Example Order ode abricated E R 04 04A XXX 150 y abricated Thermowell y Screwed onnection y Threaded y 1/2 N Schedule 40 y 316 Stainless Steel Material y Reduced Tip (6.6mm ore) y 1/2 SP Instrument onnection y 1/2 SP Process onnection y No Lagging Extension y 150mm Immersion Length

8 Order ode - abricated Thermowell - langed onnection abricated Thermowell abricated Type (Table 2) Sliding ush Running Nipple Threaded emale Hex bar A Tube / Size (Table 3) 11.0 x 7.0mm 1/2 Nominal ore Schedule 40 1/2 Nominal ore Schedule 80 G Material 316 Stainless Steel 316L Stainless Steel Other (State requirement) XXX Tip Type End ap Reduced Tip R Instrument onnection (Table 4) Enter ode from table lange Type (Table 6) illet Welded lange Loose acking lange & Stub lange W L lange Size / Rating + lange acing (Table 7) Enter ode from table Loose acking lange Material 316 Stainless Steel 316L Stainless Steel A105 arbon Steel Not required E X Lagging Extension T Enter length in mm (Maximum 100mm) * Enter length in mm (Minimum 90mm Maximum 1200mm) Example Order ode abricated R 04A W X XXX 150 y abricated Thermowell y langed onnection y Threaded y 1/2 N Schedule 40 y 316 Stainless Steel Material y Reduced Tip (6.6mm ore) y 1/2 SP Instrument onnection y 1 600lb lange raised face y No loose acking lange y No Lagging Extension y 150mm Immersion Length TM ISO9001:2015 ritish Rototherm ompany Limited Kenfig Industrial Estate, Margam, Port Talbot SA13 2PW United Kingdom Excellence the World can Measure TM T: +44 (0) : +44 (0) E: sales@rototherm.co.uk W: In keeping with ritish Rototherm s policy for continual product development and improvement, we reserve the right to amend specifications without notice Rototherm Group. All rights reserved. ompany registered in Wales : Registered office as above.