Strainers

Sweco Fab, Inc. manufactures conical strainers per ANSI B31.3 and other codes. Line strainers, tee type strainers and perforated plates are also available.

Sweco Fab/PT&P also manufactures:

  1. Basket Strainers
  2. Line Strainers
  3. Tee Type Strainers
  4. Perforated Plates

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Conical Strainers

Dimensions are in Inches
Standard perf is 1/8” opening on 3/16” centers
NOTE: Standard Handle and Ring Thickness is 1/8” (11 GA)
NOTE: Standard Handle Width (W) is 1”
NOTE: Standard Handle Length (H) is 3 1/2”

NPSOD (ALL)ID (ALL)L (WH)L (PH)          D
1503006009001500150/300600/9001500150%200%300%150%200%300%
1 1/23 1/43 5/83 5/83 3/43 3/41 3/81 3/81 1/8345 3/422 1/23 1/21
244 1/44 1/45 1/25 1/21 7/81 3/41 1/245 1/47 1/22 3/43 1/24 3/41 1/4
2 1/24 3/4556 3/86 3/82 1/42 1/424 3/469345 3/41 1/2
35 1/45 3/45 3/46 1/26 3/42 7/82 3/42 3/85 3/47 3/411 1/43 3/44 3/472
3 1/26 1/46 3/86 1/4––3 3/83 3/8–6 3/48 3/413 1/44 1/45 3/48 1/42 1/4
46 3/477 1/288 1/83 7/83 5/83 1/47 1/2101556.259 1/42 5/8
57 5/88 3/89 3/89 5/89 7/84 7/84 3/83 7/89 1/212 1/218 3/467 3/411 1/23 3/8
68 5/89 3/410 3/811 1/4115 7/85 1/44 3/411 1/41522 1/279 1/413 3/44
810 7/81212 1/214–7 5/86 7/8–14 1/419 1/4298 3/411 1/217 1/45 1/2
1013 1/414 1/815 5/817–9 3/48 3/4–18 1/424 1/236 3/411 1/414 3/421 3/47
121616 1/217 7/819 1/2–11 3/410 1/2–21 3/429 1/44413 1/417 1/2268 1/2
1417 1/21919 1/420 3/8–1311 1/2–2432 1/24914 1/219 1/428 3/49 1/2
1620 1/821 1/822 1/822 1/2–14 3/413 1/4–27 3/4375616 3/4223311
1821 1/223 3/82425–16 3/415–31 1/4426418 3/4253712 1/2
2023 3/425 5/826 3/427 3/8–18 3/416 3/4–34 3/447712127 3/44114
2428 1/830 3/83132 7/8–22 3/820 1/8–42578625 1/433 1/25017

Line Strainers

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 :

1. TYPE
2. FLOW RATE ( liquid, gmp, density ); ( vapor/gas, lbs./hr., mol. wt . )
3. DESIGN PRES., psig; temp., oF
4. STRAINER SIZE
5. PIPE LINE SIZE, flange rating or weld ends.
6. WIRE CLOTH SIZE AND REQUIRED MATERIALS
7. CASTING MATERIAL; standard or custom.
8. SUPPORT; lugs, legs, ring or none
9. CODE COMPLIANCE, ANSI B31.–
10. SPARE PARTS; baskets, gaskets


IV. 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.

Tee Type Strainers

Down-Flow (without blowdown)
Type 59-T Type 59-TQ
(Quick Opening Cover)
TYPE 60-T
Horizontal or Vertical (with blowdown)

 

Tap for blowdown valve:
– 1/2″ IPS (size 2 – 6 strainer)
– 1″ IPS (size 8 – 20 strainer)
– 2″ IPS (size 24-48 strainer)

Type BD-T fine mesh wire cloth can be added inside, if required.
Pipe SizeABCDEF
1503006009001500150300600900150015030060090015001503006009001500
22 1/21010 1/211 1/413 1/213 1/25 3/46 1/86 7/88 1/28 1/255 1/45 5/89 1/49 1/410 3/411 3/812 1/215 1/415 1/41/4
2 1/2311 1/21212 1/214 3/414 3/46 5/877 3/49 1/49 1/45 3/466 3/810 3/810 3/812 3/81313 7/816 5/816 5/81/4
33 3/812 1/41313 3/415 1/416 1/27 1/167 5/88 3/89 3/810 3/86 1/86 1/26 7/81111 5/813 3/1614 1/815 1/41718 5/81/4
44 1/814 1/41516 3/417 3/418 1/28 1/168 3/410 1/810 7/811 5/87 1/87 1/28 3/81313 3/815 3/1616 1/418 1/21920 7/81/4
54 7/816 3/417 1/219 1/420 1/422 1/29 5/1610 1/811 5/812 3/814 3/88 3/88 3/49 5/81516 1/817 11/1618 7/821 1/422 1/225 5/83/8
65 5/818 1/4192122 3/425 1/410 1/810 15/1612 5/813 13/1616 1/89 1/89 1/210 1/21718 1/419 1/420 7/1623 1/825 3/1628 3/43/8
872222 3/42527 1/431 1/412 1/81314 15/1616 3/819 1/21111 3/812 1/220 5/822 5/823 1/824 3/827 7/163035 1/83/8
108 1/22526 1/429 1/23213 11/161517 1/21912 1/213 1/814 3/424 1/226 3/1628 3/832 1/4253/8
12102930 1/432 3/436 1/415 3/417 1/819 1/421 1/214 1/215 1/816 3/828 1/830 1/432 1/435 5/839 5/83/8
14113233 1/435 1/217 3/818 3/420 3/41616 5/817 3/433 3/835 3/838 1/21/2
16123435 1/238 1/218 7/162022 1/21616 5/817 3/433 3/835 3/838 1/21/2
1813 1/23839 1/24220 9/1622 1/824 1/219 19 3/42139 9/1641 7/845 1/21/2
201541 3/842 3/445 1/222 3/823 7/826 1/220 11/1621 3/822 3/443 1/1645 1/449 1/41/2
24174647 1/450 1/224 7/826 3/829 1/223 23 5/825 1/447 7/850 54 3/41/2

Basket Strainers

 

Blow-off Type for steam

Open basket bottom seats on base plate for direct blowdown
Steam Service Design

Quick Opening Cover
Various brands and types

Type A
Elevation with blind flange
Type B
Elevation with Davit Assembly
Type C
Elevation with blind flange, Davit Assembly (optional)

Optional Covers

150 PSIG

Sizes, Dimensions and Weights
Nominal Line Size (in.)Nozzle Size (in.)Vessel Size (in.)Basket SizeA (in.)B (in.)C (in.)D (in.)Wall ThicknessPads Req'dDrian Ring ThicknessRatio of Inlet ID Area to Basket Open AreaNominal Line Size (in.)
Diam. (in.)Avg. Ht (in.)Nozzle (in.)Vessel (in.)Size (in.)Support (in.)Basket (in.)
22.3758.62555 1/2918 1/2179 1/20.2180.322No3/41/41/41000%2
33.58.62555 1/2918 1/2199 1/20.2160.322No3/41/41/4500%3
44.510.7568112421130.2370.365No3/41/41/4500%4
66.62512.7581012 3/827 7/82415 1/20.280.375No3/41/41/4400%6
88.625161013153528200.3220.375No11/41/4350%8
10 10.7518121617 3/840 7/831 1/223 1/20.3650.375No11/41/4350%10
1212.7520141919 5/846 5/834270.3750.375No21/41/4350%12
16162418272257 1/240 1/235 1/20.3750.375No21/41/4350%16
1818302028246248380.50.5No21/41/4300%18

300 PSIG

Sizes, Dimensions and Weights
Nominal Line Size (in.)Nozzle Size (in.)Vessel Size (in.)Basket SizeA (in.)B (in.)C (in.)D (in.)Wall ThicknessPads Req'dDrian Ring ThicknessRatio of Inlet ID Area to Basket Open AreaNominal Line Size (in.)
Diam. (in.)Avg. Ht (in.)Nozzle (in.)Vessel (in.)Size (in.)Support (in.)Basket (in.)
22.3758.62555 1/2918 1/2189 1/20.2180.322No3/41/41/41000%2
33.58.62555 1/2918 1/2219 1/20.2160.5No3/41/41/4500%3
44.510.7568112423 1/2130.2370.5No3/41/41/4500%4
66.62512.7581012 3/827 7/82715 1/20.280.5No3/41/41/4400%6
88.625161013153532200.50.656No11/41/4350%8
10 10.7518121617 3/840 7/83623 1/20.50.656No11/41/4350%10
1212.7520141919 5/846 5/840270.50.812No21/41/4350%12

600 PSIG

Sizes, Dimensions and Weights
Nominal Line Size (in.)Nozzle Size (in.)Vessel Size (in.)Basket SizeA (in.)B (in.)C (in.)D (in.)Wall ThicknessPads Req'dDrian Ring ThicknessRatio of Inlet ID Area to Basket Open AreaNominal Line Size (in.)
Diam. (in.)Avg. Ht (in.)Nozzle (in.)Vessel (in.)Size (in.)Support (in.)Basket (in.)
22.3758.62555 1/2918 1/2219 1/20.2180.593No3/41/41/41000%2
33.58.62555 1/2918 1/2239 1/20.30.593No3/41/41/4500%3
44.510.7568112426 1/2130.3370.5Yes3/41/41/4500%4
66.62512.7581012 3/827 7/831 1/215 1/20.4320.5Yes3/41/41/4400%6
88.625161013153538200.50.656Yes11/41/4350%8
10 10.7518121617 3/840 7/842 1/223 1/20.50.656Yes11/41/4350%10
1212.7520141919 5/846 5/845 1/2270.6870.812Yes21/41/4350%12

Perforated Plates

Perforated plates flat plate with ring (partially perforated)
Flat Plate with Ring (partially perforated)
Perforated plates flat plate without ring (totally perforated)
Flat Plate without Ring (totally perforated)
NOMINAL PIPE SIZEID150# ASA300# ASA600# ASA900# ASA
3/43/42 1/82 1/22 1/22 5/8
112 1/22 3/42 3/43
1 1/21 1/23 1/43 5/83 5/83 3/4
2244 1/44 1/45 1/2
2 1/22 1/24 3/4556 3/8
335 1/45 3/45 3/46 1/2
446 3/477 1/28
557 5/88 3/89 3/89 5/8
668 5/89 3/410 3/811 1/4
8810 7/81212 1/214
101013 1/414 1/815 5/817
12121616 1/217 7/819 1/2
1413 1/417 5/81919 1/420 3/8
1615 1/420 1/821 1/822 1/822 1/2
1817 1/421 1/223 5/82425
2019 1/423 3/425 5/826 3/427 3/8
2423 1/428 1/830 3/83132 7/8
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