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GRADE	FILTRATION RANGE		NOMINAL FILTRATION		U.S. STD. SCREEN (Approximate)	PRACTICAL MINIMUM THICKNESS INCHES	TENSILE STRENGTH PSI*	PRESSURE DROP RATIO**
GRADE	INCHES	MICRONS	INCHES	MICRONS	U.S. STD. SCREEN (Approximate)	PRACTICAL MINIMUM THICKNESS INCHES	TENSILE STRENGTH PSI*	PRESSURE DROP RATIO**
12	.007 TO .012	180-300	.010	250	80-50	.188	2,000	1
23	.005 TO .007	128-180	.006	150	120-80	.125	3,000	2
34	.002 TO .005	51-128	.0035	90	270-100	.090	4,000	4
46	.001 TO .002	26-51	.0015	40	400-270	.060	5,000	8
68	.0008 TO .0018	21-45	.0014	35	-400	.050	5,000	10
83	.0006 TO .0012	16-32	.001	25	NA	.040	6,000	24
103	.0005 TO .001	13-26	.0008	20	NA	.040	6,000	40
153	.00025 TO .0005	7-13	.0004	10	NA	.040	7,000	80

Tensile strength of new pre-alloyed material grades will deviate from this table. *Shows approximate relationship between pressure dorp and grade of material for a given area, thickness and flow. Directly proportional relationship exists with increased thickness. Inversely proportional relationship exists with increased area.