Spades and Ring Spacer Flange

The term “Spades and Ring Spacer Flange” seems to pertain to specific components used in piping and mechanical systems. Here’s a breakdown of each term in this context:

Spades: In industrial and piping contexts, “spades” refer to a type of blind flange or plate used to block the flow of fluid in a pipeline. They are often used for isolation purposes during maintenance or repair work. Spades are typically flat and have no openings, effectively sealing off the pipe.
Ring: In this context, the “ring” could be a ring gasket or a ring spacer. A ring gasket is used to create a seal between two flanges, preventing leakage of fluids. A ring spacer is used to provide a specific spacing between components, often to accommodate different thicknesses or align parts correctly.
Spacer Flange: A spacer flange is a component that fits between two flanges to extend the distance between them. It allows for adjustments in alignment or spacing and can also help in reducing vibrations or accommodating thermal expansion.

When combined as “Spades and Ring Spacer Flange,” this likely refers to an assembly or configuration that includes:

Spades: To block or isolate sections of a pipeline.
Ring: To provide sealing or spacing functions.
Spacer Flange: To adjust the distance between flanges or components.

In practice, such an assembly might be used in a pipeline system where spades are inserted to isolate a section for maintenance, while ring spacers and spacer flanges are used to ensure proper alignment and spacing between flanged connections.

Table below provides spade and spacer dimensions made from ASTM A285 GrC plates for use on Class 150 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 150 Series A Flanges – Material of Spade and Spacer: ASTM A285 GrC

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	1.45	36.92	39.92	769	647	510	50
28	711.2	1.57	39.76	42.76	827	698	540	55
30	762	1.68	42.60	45.60	877	749	565	60
32	812.8	1.79	45.44	48.44	935	800	605	60
34	863.6	1.90	48.28	51.28	986	850	630	60
36	914.4	2.01	51.12	54.12	1043	901	660	60
38	965.2	2.12	53.96	56.96	1106	952	695	60
40	1016	2.24	56.80	59.80	1157	1003	720	60
42	1066.8	2.35	59.64	62.64	1214	1054	750	60
44	1117.6	2.46	62.48	65.48	1271	1104	775	60
46	1168.4	2.57	65.32	68.32	1322	1155	800	60
48	1219.2	2.68	68.16	71.16	1379	1206	855	60
50	1270	2.80	71.00	74.00	1430	1257	885	60
52	1320.8	2.91	73.83	76.83	1487	1308	915	60
54	1371.6	3.02	76.67	79.67	1544	1358	940	60
56	1422.4	3.13	79.51	82.51	1601	1409	975	60
58	1473.2	3.24	82.35	85.35	1658	1460	1000	60
60	1524	3.35	85.19	88.19	1709	1511	1025	60

Basis for calculation of Spade and Spacer Dimensions

Spades are used in piping systems to positively isolate sections of piping from one another. The spades are subject to the design pressure and hence the thickness of spades must be able to withstand the design pressure. As per para. 304.5.3(b) of ASME B31.3, the minimum required thickness of a permanent blank shall be calculated in accordance with following equation:

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

In the calculation of spade thickness, we adopted a slightly different approach which provides conservative values. We know from para. 2.5 of ASME B16.5 that line blanks may be subjected to system tests at a pressure not to exceed 1.5 times the 38°C (100°F) rating rounded off to the next higher 1 bar (25 psi) increment. In the calculation we used a value of P that corresponds to the hydrostatic test pressure (1.5 x Flange Rating Pressure) rounded of to the next higher 25 psi increment.

For Class 150 the value of P considered is 450 psi (285psi x 1.5 = 427.5psi rounded to 450psi)

The value of allowable stress is taken as 90% SMYS of the material. The SMYS for ASTM A285 GrC material as per Table A-1 of ASME B31.3 is 30000 psi. Hence the value of allowable stress S = 30000 psi. E and W are considered as 1 in the equation.

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Table below provides spade and spacer dimensions made from ASTM A285 GrC plates for use on Class 300 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 300 Series A Flanges – Material of Spade and Spacer: ASTM A285 GrC

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	2.30	58.37	61.37	830	647	515	60
28	711.2	2.47	62.86	65.86	893	698	545	55
30	762	2.65	67.35	70.35	947	749	575	55
32	812.8	2.83	71.84	74.84	1001	800	600	55
34	863.6	3.01	76.33	79.33	1052	850	625	50
36	914.4	3.18	80.82	83.82	1113	901	655	55
38	965.2	3.36	85.31	88.31	1049	952	625	55
40	1016	3.54	89.80	92.80	1109	1003	655	55
42	1066.8	3.71	94.29	97.29	1160	1054	680	55
44	1117.6	3.89	98.78	101.78	1214	1104	705	45
46	1168.4	4.07	103.27	106.27	1268	1155	735	45
48	1219.2	4.24	107.76	110.76	1319	1206	760	40
50	1270	4.42	112.25	115.25	1373	1257	785	45
52	1320.8	4.60	116.74	119.74	1424	1308	810	45
54	1371.6	4.77	121.23	124.23	1487	1358	845	45
56	1422.4	4.95	125.72	128.72	1538	1409	870	40
58	1473.2	5.13	130.21	133.21	1589	1460	895	40
60	1524	5.30	134.70	137.70	1639	1511	920	40

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 300 the value of P considered is 1125 psi (750psi x 1.5 = 1125ps

Table below provides spade and spacer dimensions made from ASTM A285 GrC plates for use on Class 600 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 600 Series A Flanges – Material of Spade and Spacer: ASTM A285 GrC

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	3.25	82.55	85.55	862	647	530	45
28	711.2	3.50	88.90	91.90	909	698	555	50
30	762	3.75	95.25	98.25	967	749	585	55
32	812.8	4.00	101.60	104.60	1017	800	610	55
34	863.6	4.25	107.95	110.95	1068	850	635	55
36	914.4	4.50	114.30	117.30	1125	901	665	55
38	965.2	4.75	120.65	123.65	1100	952	650	55
40	1016	5.00	127.00	130.00	1150	1003	675	55
42	1066.8	5.25	133.35	136.35	1214	1054	705	60
44	1117.6	5.50	139.70	142.70	1265	1104	735	60
46	1168.4	5.75	146.05	149.05	1322	1155	760	60
48	1219.2	6.00	152.40	155.40	1385	1206	795	60
50	1270	6.25	158.75	161.75	1443	1257	820	60
52	1320.8	6.50	165.10	168.10	1494	1308	845	60
54	1371.6	6.75	171.45	174.45	1551	1358	875	60
56	1422.4	7.00	177.80	180.80	1608	1409	905	60
58	1473.2	7.25	184.15	187.15	1658	1460	930	60
60	1524	7.50	190.50	193.50	1729	1511	965	60

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 600 the value of P considered is 2250 psi (1500psi x 1.5 = 2250psi)

The value of allowable stress is taken as 90% SMYS of the material. The SMYS for ASTM A285 GrC material as per Table A-1 of ASME B31.3 is 30000 psi. Hence the value of allowable stress S = 27000 psi. E and W are considered as 1 in the equation.

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Table below provides spade and spacer dimensions made from ASTM A285 GrC plates for use on Class 900 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 900 Series A Flanges – Material of Spade and Spacer: ASTM A285 GrC

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	3.98	101.10	104.10	877	647	540	65
28	711.2	4.29	108.88	111.88	941	698	570	65
30	762	4.59	116.66	119.66	1005	749	605	65
32	812.8	4.90	124.43	127.43	1068	800	635	65
34	863.6	5.21	132.21	135.21	1132	850	665	65
36	914.4	5.51	140.00	142.99	1195	901	700	65
38	965.2	5.82	147.77	150.77	1195	952	700	65
40	1016	6.12	155.54	158.54	1246	1003	725	65
42	1066.8	6.43	163.32	166.32	1297	1054	750	65
44	1117.6	6.74	171.10	174.10	1363	1104	780	65
46	1168.4	7.04	178.87	181.87	1430	1155	815	65
48	1219.2	7.35	186.65	189.65	1481	1206	840	65

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 900 the value of P considered is 3375psi (2250psi x 1.5 = 3375psi)

The value of allowable stress is taken as 90% SMYS of the material. The SMYS for ASTM ASTM A285 GrC material as per Table A-1 of ASME B31.3 is 30000 psi. Hence the value of allowable stress S = 27000 psi. E and W are considered as 1 in the equation.

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Table below provides spade and spacer dimensions for use on Class 150 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 150 Series A Flanges – Material of Spade and Spacer: ASTM A516 Gr70

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	1.29	32.80	35.80	769	647	510	50
28	711.2	1.39	35.33	38.33	827	698	540	55
30	762	1.49	37.85	40.85	877	749	565	60
32	812.8	1.59	40.37	43.37	935	800	605	60
34	863.6	1.69	42.89	45.89	986	850	630	60
36	914.4	1.79	45.42	48.42	1043	901	660	60
38	965.2	1.89	47.94	50.94	1106	952	695	60
40	1016	1.99	50.46	53.46	1157	1003	720	60
42	1066.8	2.09	52.99	55.99	1214	1054	750	60
44	1117.6	2.19	55.51	58.51	1271	1104	775	60
46	1168.4	2.28	58.03	61.03	1322	1155	800	60
48	1219.2	2.38	60.56	63.56	1379	1206	855	60
50	1270	2.48	63.08	66.08	1430	1257	885	60
52	1320.8	2.58	65.60	68.60	1487	1308	915	60
54	1371.6	2.68	68.13	71.13	1544	1358	940	60
56	1422.4	2.78	70.65	73.65	1601	1409	975	60
58	1473.2	2.88	73.17	76.17	1658	1460	1000	60
60	1524	2.98	75.70	78.70	1709	1511	1025	60

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 150 the value of P considered is 450 psi (285psi x 1.5 = 427.5psi rounded to 450psi)

The value of allowable stress is taken as 90% SMYS of the material. The SMYS for ASTM A516 Gr70 material as per Table A-1 of ASME B31.3 is 38000 psi. Hence the value of allowable stress S = 34200 psi. E and W are considered as 1 in the equation.

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Table below provides spade and spacer dimensions made from ASTM A516 Gr70 plates for use on Class 300 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 300 Series A Flanges – Material of Spade and Spacer: ASTM A516 Gr70

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	2.04	51.86	54.86	830	647	515	60
28	711.2	2.20	55.85	58.85	893	698	545	55
30	762	2.36	59.84	62.84	947	749	575	55
32	812.8	2.51	63.83	66.83	1001	800	600	55
34	863.6	2.67	67.82	70.82	1052	850	625	50
36	914.4	2.83	71.81	74.81	1113	901	655	55
38	965.2	2.98	75.80	78.80	1049	952	625	55
40	1016	3.14	79.79	82.79	1109	1003	655	55
42	1066.8	3.30	83.78	86.78	1160	1054	680	55
44	1117.6	3.46	87.77	90.77	1214	1104	705	45
46	1168.4	3.61	91.76	94.76	1268	1155	735	45
48	1219.2	3.77	95.75	98.75	1319	1206	760	40
50	1270	3.93	99.74	102.74	1373	1257	785	45
52	1320.8	4.08	103.73	106.73	1424	1308	810	45
54	1371.6	4.24	107.72	110.72	1487	1358	845	45
56	1422.4	4.40	111.71	114.71	1538	1409	870	40
58	1473.2	4.56	115.70	118.70	1589	1460	895	40
60	1524	4.71	119.69	122.69	1639	1511	920	40

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 300 the value of P considered is 1125 psi (750psi x 1.5 = 1125psi).

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Table below provides spade and spacer dimensions made from ASTM A516 Gr70 plates for use on Class 600 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 600 Series A Flanges – Material of Spade and Spacer: ASTM A516 Gr70

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	2.89	73.35	76.35	862	647	530	45
28	711.2	3.11	78.99	81.99	909	698	555	50
30	762	3.33	84.63	87.63	967	749	585	55
32	812.8	3.55	90.27	93.27	1017	800	610	55
34	863.6	3.78	95.92	98.92	1068	850	635	55
36	914.4	4.00	101.56	104.56	1125	901	665	55
38	965.2	4.22	107.20	110.20	1100	952	650	55
40	1016	4.44	112.84	115.84	1150	1003	675	55
42	1066.8	4.66	118.48	121.48	1214	1054	705	60
44	1117.6	4.89	124.13	127.13	1265	1104	735	60
46	1168.4	5.11	129.77	132.77	1322	1155	760	60
48	1219.2	5.33	135.41	138.41	1385	1206	795	60
50	1270	5.55	141.05	144.05	1443	1257	820	60
52	1320.8	5.78	146.70	149.70	1494	1308	845	60
54	1371.6	6.00	152.34	155.34	1551	1358	875	60
56	1422.4	6.22	157.98	160.98	1608	1409	905	60
58	1473.2	6.44	163.62	166.62	1658	1460	930	60
60	1524	6.66	169.26	172.26	1729	1511	965	60

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 600 the value of P considered is 2250 psi (1500psi x 1.5 = 2250psi)

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Table below provides spade and spacer dimensions made from ASTM A516 Gr70 plates for use on Class 900 Series A flanges.

Read the section at the bottom of table for basis of the calculations for dimensions of spade and spacer.

All dimensions are in “mm” unless noted otherwise.

Table for Class 900 Series A Flanges – Material of Spade and Spacer: ASTM A516 Gr70

Nom Size Inches	Pipe OD mm	Pressure Thickness of Spade Inches	Pressure Thickness of Spade mm	Pressure Thickness + 3mm ‘T’	OD of Spade Spacer mm ‘A’	ID of Spacer mm ‘D’	Dimension mm ‘B’	Dimension mm ‘C’
26	660.4	3.54	89.83	92.83	877	647	540	65
28	711.2	3.81	96.74	99.74	941	698	570	65
30	762	4.08	103.65	106.65	1005	749	605	65
32	812.8	4.35	110.56	113.56	1068	800	635	65
34	863.6	4.62	117.47	120.47	1132	850	665	65
36	914.4	4.90	124.38	127.38	1195	901	700	65
38	965.2	5.17	131.29	134.29	1195	952	700	65
40	1016	5.44	138.20	141.20	1246	1003	725	65
42	1066.8	5.71	145.11	148.11	1297	1054	750	65
44	1117.6	5.99	152.02	155.02	1363	1104	780	65
46	1168.4	6.26	158.93	161.93	1430	1155	815	65
48	1219.2	6.53	165.84	168.84	1481	1206	840	65

Basis for calculation of Spade and Spacer Dimensions

t_m = d_g $\sqrt{\frac{3 P}{16 S E W}}$ + c

where

c = sum of allowances (mechanical + corrosion + mill tolerance)

d_g = inside diameter of gasket for raised or flat face flanges, or gasket pitch diameter for ring joint and full retained gasketed flanges.

E = quality factor from Table A-1A or A-1B

P = design gage pressure

S = allowable stress value for material from Table A-1

W = weld strength reduction factor

For Class 900 the value of P considered is 3375psi (2250psi x 1.5 = 3375psi)

Outside diameter of spade and spacer is calculated as bolt circle diameter of flange minus the bolt hole diameter-1.5mm.

Inside diameter of spacer is calculated as pipe outside diameter minus 6.35 mm.

Dimension B is calculated considering a projection of 75mm of center of handle hole from outside diameter of flange for sizes up to 46 inches and 100mm projection for sizes 48 inches and above.

While calculating dimension ‘C’ it is checked that the spade and spacer handle can pass through the gap between two adjacent bolts.

The thickness of spade excludes the projection for raised face.

Thickness T in table above assumes sum of allowances ‘c’ of 3mm.

Spades and Ring Spacer Flange

Dimensions of Class 150 Spades for Series A Flanges A285 GrC

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 300 Spades for Series A Flanges A285 GrC

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 600 Spades for Series A Flanges A285 GrC

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 900 Spades for Series A Flanges A285 GrC

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 150 Spades for Series A Flanges A516 Gr70

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 300 Spades for Series A Flanges A516 Gr70

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 600 Spades for Series A Flanges A516 Gr70

Basis for calculation of Spade and Spacer Dimensions

Dimensions of Class 900 Spades for Series A Flanges A516 Gr70

Basis for calculation of Spade and Spacer Dimensions