Cat16 R2

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TS Mountings

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Straight Assemblies - Mounting Attachments

P

Metal Tube

U

Welded Bushings (W)

4 A welded bushing is welded directly on the protection tube. The tube can then be screwed into the furnace to give a gas tight seal. Protection tubes with a welded bushing are more expensive than threaded fittings since the alloy extends outside the furnace. Also the bushing must be replaced with the tube. The standard outside thread size on a welded bushing is 1 1/4” NPT. 1/2” NPT welded bushings are used as standard outside threads on 1/4” and 1/8” pipe sizes. Other sizes can be ordered by specifying the size in 1/16ths of and inch. See under accessories for lengths of bushings. Example: A 1 1/2” x 1/2” 1/2” NPT welded bushing would be a W2408 . See “Bushings” under “Accessories” for more details. To add a welded bushing to a metal assembly, add ( W ) to the part number followed by the immersion “U” length Example: Metal: 8K4-734XH-36-W-24-SH (36”, #7 alloy metal tube assembly, 1 1/4” NPT welded bushing, 24” immersion (U) length measured from the tip of the tube to the bottom of the bushing.) The immersion length (U) is shown on the figure above. In most cases the tube should extend into fluids at least six times the outside diameter of the tube. If the tube is going into a gas, it should extend a minimum of eight times the outside diameter of the tube.

Flange

P

Raised Face (RF)

Raised Face

U

Metal Tube Flange (FS & RF) Assemblies Stainless Steel ANSI Blind Flanges are available with a Raised Faced ( RF ) or Flat Faced ( FS ) gasket surface. A gasket gives a gas tight seal. The more commonly used Raised Faced flanges are the low pressure 150# Class or the high pressure 300# Class. All Raised Faced flanges are forged and meet ASTM A182 and ANSI/ASME B16.5 specifications. Raised faced thicknesses above the flange face are 1/16” (1.59 mm) for the 150 and 300 pressure classes and 1/4” (6.35 mm) in the 400, 600, 900, 1500, and 2500 clas- ses. Low pressure stainless steel Flat Faced ( FS ) 150# Class flanges, also known as the Manufacturers Standardization Society (MSS) flanges, are machined from castings. These Flat Flanges meet ASTM A351 and conform to MSS SP-42 for diameter and bolt holes and also MSS SP-51 for thickness. ANSI flanges (Flat & Raised Faced) are usually machined from 316 Stainless Steel stock. The 316 Stainless Steel contains more Nickel and has the addition of Molybdenum which gives it better corrosion resistance than 304 Stainless Steel. Part Numbers are composed of : Tube-Tube Length “P”- Flange Number (see table)-Material Code (see table)- ”U” Length– Head Example: 722-18-FS2415-CS-12–SH Assembly (FS = Flat Faced - Carbon Steel) 316SS flanges are standard (and the Material Code may be omitted from the part Number). Example: 722-18-RF2415-12 –SH Assembly (pictured above is Raised Face) Note: Blind Flanges are drilled for the required Protection Tube pipe size.

5

MC = Material Code from this table. Other Materials available upon request. Also see Material Code table on page 97 (Thermowells).

Partial Flange Table. For the complete table, see page 199.

FS & RF Part Number

Pipe Size

Lbs / Inch

Flange Diameter

RF Diameter

Flange Thickness, minimum

Bolt Circle Diameter

Number of Bolts

Bolt Hole Diameter

Flange Material Codes Selection

Material

Cod

1615 2415 2430 2460 4815 6415 32150

1” 1 1/2” 1 1/2” 1 1/2”

150 150 300 600 150 150 1500

4.25 5.00 6.12 6.12 7.50 9.00 8.50

2” 2.88” 2.88” 2.88” 5.00” 6.19” 3.62”

0.56 0.69 0.81 0.88 0.94 0.94 1.50

3.12 3.88 4.50 4.50 6.00 7.50 6.50

4 4 4 4 4 8 8

0.62 0.62 0.88 0.88 0.75 0.75 1.00

304 Stainless 316 Stainless 446 Stainless Carbon Steel Inconel 600 Inconel 601

08 16 07 CS

3” 4” 2”

09 06

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