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.

Product Specific Information
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Sweco Fab/PT&P also manufactures:

Basket Strainers
Line Strainers
Tee Type Strainers
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”

NPS

OD (ALL)

ID (ALL)

L (WH)

L (PH)

150

300

600

900

1500

150/300

600/900

1500

150%

200%

300%

150%

200%

300%

1 1/2

3 1/4

3 5/8

3 3/4

1 3/8

1 1/8

5 3/4

2 1/2

3 1/2

4 1/4

5 1/2

1 7/8

1 3/4

1 1/2

5 1/4

7 1/2

2 3/4

3 1/2

4 3/4

1 1/4

2 1/2

4 3/4

6 3/8

2 1/4

4 3/4

5 3/4

1 1/2

5 1/4

5 3/4

6 1/2

6 3/4

2 7/8

2 3/4

2 3/8

5 3/4

7 3/4

11 1/4

3 3/4

4 3/4

3 1/2

6 1/4

6 3/8

6 1/4

3 3/8

6 3/4

8 3/4

13 1/4

4 1/4

5 3/4

8 1/4

2 1/4

6 3/4

7 1/2

8 1/8

3 7/8

3 5/8

3 1/4

7 1/2

6.25

9 1/4

2 5/8

7 5/8

8 3/8

9 3/8

9 5/8

9 7/8

4 7/8

4 3/8

3 7/8

9 1/2

12 1/2

18 3/4

7 3/4

11 1/2

3 3/8

8 5/8

9 3/4

10 3/8

11 1/4

5 7/8

5 1/4

4 3/4

11 1/4

22 1/2

9 1/4

13 3/4

10 7/8

12 1/2

7 5/8

6 7/8

14 1/4

19 1/4

8 3/4

11 1/2

17 1/4

5 1/2

13 1/4

14 1/8

15 5/8

9 3/4

8 3/4

18 1/4

24 1/2

36 3/4

11 1/4

14 3/4

21 3/4

16 1/2

17 7/8

19 1/2

11 3/4

10 1/2

21 3/4

29 1/4

13 1/4

17 1/2

8 1/2

17 1/2

19 1/4

20 3/8

11 1/2

32 1/2

14 1/2

19 1/4

28 3/4

9 1/2

20 1/8

21 1/8

22 1/8

22 1/2

14 3/4

13 1/4

27 3/4

16 3/4

21 1/2

23 3/8

16 3/4

31 1/4

18 3/4

12 1/2

23 3/4

25 5/8

26 3/4

27 3/8

18 3/4

16 3/4

34 3/4

27 3/4

28 1/8

30 3/8

32 7/8

22 3/8

20 1/8

25 1/4

33 1/2

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 Size

150

300

600

900

1500

150

300

600

900

1500

150

300

600

900

1500

150

300

600

900

1500

2 1/2

10 1/2

11 1/4

13 1/2

5 3/4

6 1/8

6 7/8

8 1/2

5 1/4

5 5/8

9 1/4

10 3/4

11 3/8

12 1/2

15 1/4

1/4

2 1/2

11 1/2

12 1/2

14 3/4

6 5/8

7 3/4

9 1/4

5 3/4

6 3/8

10 3/8

12 3/8

13 7/8

16 5/8

1/4

3 3/8

12 1/4

13 3/4

15 1/4

16 1/2

7 1/16

7 5/8

8 3/8

9 3/8

10 3/8

6 1/8

6 1/2

6 7/8

11 5/8

13 3/16

14 1/8

15 1/4

18 5/8

1/4

4 1/8

14 1/4

16 3/4

17 3/4

18 1/2

8 1/16

8 3/4

10 1/8

10 7/8

11 5/8

7 1/8

7 1/2

8 3/8

13 3/8

15 3/16

16 1/4

18 1/2

20 7/8

1/4

4 7/8

16 3/4

17 1/2

19 1/4

20 1/4

22 1/2

9 5/16

10 1/8

11 5/8

12 3/8

14 3/8

8 3/8

8 3/4

9 5/8

16 1/8

17 11/16

18 7/8

21 1/4

22 1/2

25 5/8

3/8

5 5/8

18 1/4

22 3/4

25 1/4

10 1/8

10 15/16

12 5/8

13 13/16

16 1/8

9 1/8

9 1/2

10 1/2

18 1/4

19 1/4

20 7/16

23 1/8

25 3/16

28 3/4

3/8

22 3/4

27 1/4

31 1/4

12 1/8

14 15/16

16 3/8

19 1/2

11 3/8

12 1/2

20 5/8

22 5/8

23 1/8

24 3/8

27 7/16

35 1/8

3/8

8 1/2

26 1/4

29 1/2

13 11/16

17 1/2

12 1/2

13 1/8

14 3/4

24 1/2

26 3/16

28 3/8

32 1/4

3/8

30 1/4

32 3/4

36 1/4

15 3/4

17 1/8

19 1/4

21 1/2

14 1/2

15 1/8

16 3/8

28 1/8

30 1/4

32 1/4

35 5/8

39 5/8

3/8

33 1/4

35 1/2

17 3/8

18 3/4

20 3/4

16 5/8

17 3/4

33 3/8

35 3/8

38 1/2

1/2

35 1/2

38 1/2

18 7/16

22 1/2

16 5/8

17 3/4

33 3/8

35 3/8

38 1/2

1/2

13 1/2

39 1/2

20 9/16

22 1/8

24 1/2

19 3/4

39 9/16

41 7/8

45 1/2

1/2

41 3/8

42 3/4

45 1/2

22 3/8

23 7/8

26 1/2

20 11/16

21 3/8

22 3/4

43 1/16

45 1/4

49 1/4

1/2

47 1/4

50 1/2

24 7/8

26 3/8

29 1/2

23 5/8

25 1/4

47 7/8

54 3/4

1/2

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 Size		A (in.)	B (in.)	C (in.)	D (in.)	Wall Thickness		Pads Req'd	Drian Ring Thickness			Ratio of Inlet ID Area to Basket Open Area	Nominal Line Size (in.)
Nominal Line Size (in.)	Nozzle Size (in.)	Vessel Size (in.)	Diam. (in.)	Avg. Ht (in.)	A (in.)	B (in.)	C (in.)	D (in.)	Nozzle (in.)	Vessel (in.)	Pads Req'd	Size (in.)	Support (in.)	Basket (in.)	Ratio of Inlet ID Area to Basket Open Area	Nominal Line Size (in.)
2	2.375	8.625	5	5 1/2	9	18 1/2	17	9 1/2	0.218	0.322	No	3/4	1/4	1/4	1000%	2
3	3.5	8.625	5	5 1/2	9	18 1/2	19	9 1/2	0.216	0.322	No	3/4	1/4	1/4	500%	3
4	4.5	10.75	6	8	11	24	21	13	0.237	0.365	No	3/4	1/4	1/4	500%	4
6	6.625	12.75	8	10	12 3/8	27 7/8	24	15 1/2	0.28	0.375	No	3/4	1/4	1/4	400%	6
8	8.625	16	10	13	15	35	28	20	0.322	0.375	No	1	1/4	1/4	350%	8
10	10.75	18	12	16	17 3/8	40 7/8	31 1/2	23 1/2	0.365	0.375	No	1	1/4	1/4	350%	10
12	12.75	20	14	19	19 5/8	46 5/8	34	27	0.375	0.375	No	2	1/4	1/4	350%	12
16	16	24	18	27	22	57 1/2	40 1/2	35 1/2	0.375	0.375	No	2	1/4	1/4	350%	16
18	18	30	20	28	24	62	48	38	0.5	0.5	No	2	1/4	1/4	300%	18

300 PSIG

Sizes, Dimensions and Weights
Nominal Line Size (in.)	Nozzle Size (in.)	Vessel Size (in.)	Basket Size		A (in.)	B (in.)	C (in.)	D (in.)	Wall Thickness		Pads Req'd	Drian Ring Thickness			Ratio of Inlet ID Area to Basket Open Area	Nominal Line Size (in.)
Nominal Line Size (in.)	Nozzle Size (in.)	Vessel Size (in.)	Diam. (in.)	Avg. Ht (in.)	A (in.)	B (in.)	C (in.)	D (in.)	Nozzle (in.)	Vessel (in.)	Pads Req'd	Size (in.)	Support (in.)	Basket (in.)	Ratio of Inlet ID Area to Basket Open Area	Nominal Line Size (in.)
2	2.375	8.625	5	5 1/2	9	18 1/2	18	9 1/2	0.218	0.322	No	3/4	1/4	1/4	1000%	2
3	3.5	8.625	5	5 1/2	9	18 1/2	21	9 1/2	0.216	0.5	No	3/4	1/4	1/4	500%	3
4	4.5	10.75	6	8	11	24	23 1/2	13	0.237	0.5	No	3/4	1/4	1/4	500%	4
6	6.625	12.75	8	10	12 3/8	27 7/8	27	15 1/2	0.28	0.5	No	3/4	1/4	1/4	400%	6
8	8.625	16	10	13	15	35	32	20	0.5	0.656	No	1	1/4	1/4	350%	8
10	10.75	18	12	16	17 3/8	40 7/8	36	23 1/2	0.5	0.656	No	1	1/4	1/4	350%	10
12	12.75	20	14	19	19 5/8	46 5/8	40	27	0.5	0.812	No	2	1/4	1/4	350%	12

600 PSIG

Sizes, Dimensions and Weights
Nominal Line Size (in.)	Nozzle Size (in.)	Vessel Size (in.)	Basket Size		A (in.)	B (in.)	C (in.)	D (in.)	Wall Thickness		Pads Req'd	Drian Ring Thickness			Ratio of Inlet ID Area to Basket Open Area	Nominal Line Size (in.)
Nominal Line Size (in.)	Nozzle Size (in.)	Vessel Size (in.)	Diam. (in.)	Avg. Ht (in.)	A (in.)	B (in.)	C (in.)	D (in.)	Nozzle (in.)	Vessel (in.)	Pads Req'd	Size (in.)	Support (in.)	Basket (in.)	Ratio of Inlet ID Area to Basket Open Area	Nominal Line Size (in.)
2	2.375	8.625	5	5 1/2	9	18 1/2	21	9 1/2	0.218	0.593	No	3/4	1/4	1/4	1000%	2
3	3.5	8.625	5	5 1/2	9	18 1/2	23	9 1/2	0.3	0.593	No	3/4	1/4	1/4	500%	3
4	4.5	10.75	6	8	11	24	26 1/2	13	0.337	0.5	Yes	3/4	1/4	1/4	500%	4
6	6.625	12.75	8	10	12 3/8	27 7/8	31 1/2	15 1/2	0.432	0.5	Yes	3/4	1/4	1/4	400%	6
8	8.625	16	10	13	15	35	38	20	0.5	0.656	Yes	1	1/4	1/4	350%	8
10	10.75	18	12	16	17 3/8	40 7/8	42 1/2	23 1/2	0.5	0.656	Yes	1	1/4	1/4	350%	10
12	12.75	20	14	19	19 5/8	46 5/8	45 1/2	27	0.687	0.812	Yes	2	1/4	1/4	350%	12

Perforated Plates

NOMINAL PIPE SIZE	ID	150# ASA	300# ASA	600# ASA	900# ASA
3/4	3/4	2 1/8	2 1/2	2 1/2	2 5/8
1	1	2 1/2	2 3/4	2 3/4	3
1 1/2	1 1/2	3 1/4	3 5/8	3 5/8	3 3/4
2	2	4	4 1/4	4 1/4	5 1/2
2 1/2	2 1/2	4 3/4	5	5	6 3/8
3	3	5 1/4	5 3/4	5 3/4	6 1/2
4	4	6 3/4	7	7 1/2	8
5	5	7 5/8	8 3/8	9 3/8	9 5/8
6	6	8 5/8	9 3/4	10 3/8	11 1/4
8	8	10 7/8	12	12 1/2	14
10	10	13 1/4	14 1/8	15 5/8	17
12	12	16	16 1/2	17 7/8	19 1/2
14	13 1/4	17 5/8	19	19 1/4	20 3/8
16	15 1/4	20 1/8	21 1/8	22 1/8	22 1/2
18	17 1/4	21 1/2	23 5/8	24	25
20	19 1/4	23 3/4	25 5/8	26 3/4	27 3/8
24	23 1/4	28 1/8	30 3/8	31	32 7/8