Sweco Fab, Inc. - ASME Code Fabricator

	ASME CODE FABRICATOR AND MACHINISTS SINCE 1956 A Subsidiary of Piping Technology & Products, Inc.
	Phone: (713) 731-0030 Toll Free: (800) 787-5914 Fax: (713) 731-8640 E-mail: info@pipingtech.com

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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

Notes:	- Flanges may be ordered with any facing
	- "Quick Opening" closures available
	- Stainless Steel or other alloys available
	- Companion flanges, bolts and gaskets available
	- Straight flow type can have flow in either direction

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

300PSIG

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

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