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I. CASTING SPECIFICATIONS
STP standards casing designs are made using the following
material specifications :
- Pipe : SA 106 B
- Flanges : SA 105
- Studs : SA-193 B 7
- Nuts : SA-194 – 2H
- Cplgs : SA-105
- Caps : SA-234 - WPB
- Gasket : 1/16" Non-asbestos
- Heads : SA-516 Gr 70 2:1 Ellip
Special alloy materials as per ASME sec.2 are available,
as well as any ANSF code specified. Custom supports using
our ring design or lug supports are also available for our
client’s needs. Our computer stress analysis programs and
flow rate programs assure our clients of uniform and
accurate designs on all PTP/SwecoFab strainers.
II. WIRE CLOTH SPECIFICATIONS
Materials:
Perforated metal
14 ga. – 1/8" dia. Holes on 3/16" centers, 33
holes per sq. inc., using carbon steel, 304SS, 304 L SS,
316SS, 316L SS, monel or nickel. Special metals available
upon request. 11 ga. Is also available.
Wire cloth : carbon steel, 304SS 316SS, brass, monel.
Basket open area to inlet pipe cross-sectional flow area
based on perforated 1/8" diameter holes on 3/16"
centers, 33 perforations per square inch (40% effective open
area).
Wire Cloth Data
|
Wire
Mesh (No.) |
Wire
Diam. (Inch) |
Percent
of Open Area % |
Width
Opening (inch) |
|
|
|
|
|
|
4X4 |
0.063 |
56.6 |
0.187 |
|
20X20 |
0.016 |
46.2 |
0.034 |
|
30X30 |
0.013 |
37.1 |
0.0203 |
|
40X40 |
0.01 |
36 |
0.015 |
|
60X60 |
0.0075 |
30.5 |
0.0092 |
|
80X80 |
0.0055 |
31.4 |
0.007 |
|
100X100 |
0.0045 |
30.3 |
0.0055 |
III. ORDERING INSTRUCTIONS
Please provide for our sales representatives the
following minimum information :
- TYPE
- FLOW RATE ( liquid, gmp, density ); ( vapor/gas,
lbs./hr., mol. wt . )
- DESIGN PRES., psig; temp., oF
- STRAINER SIZE
- PIPE LINE SIZE, flange rating or weld ends.
- WIRE CLOTH SIZE AND REQUIRED MATERIALS
- CASTING MATERIAL; standard or custom.
- SUPPORT; lugs, legs, ring or none
- CODE COMPLIANCE, ANSI B31.--
- SPARE PARTS; baskets, gaskets
- CODE COMPLIANCE
Strainers are designed in accordance with ASME B 31.3
pressure piping code latest editions. General design
criteria has incorporated the innovation that all baskets
are interchangeable for like nozzle size regardless of ANSI
rating. For other ANSI rating, ASME SEC VIII D[V], and
larger size, contact . engineering office, Houston, Texas.
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