Spade & Ring Spacer Flanges | ASME B16.48 | Line Blanks

Spade Ring Spacer Flanges  Manufacturer & Supplier By PM Industries

PM Industries manufactures, supplies, and stocks Spade Ring Spacer Flanges in a range of materials, pressure ratings, and pipe sizes. A spade and spacer ring are a matched pair of flat circular components inserted between two flanges in a piping system to provide positive line isolation or flow-through capability at that connection point. The spade is a solid disc that completely blocks flow when installed. The spacer ring, also called a ring spacer, has the same outer diameter and bolt pattern as the spade but has a full bore opening, allowing normal flow through the line when it's in place instead of the spade.

Together they form what's commonly called a line blind arrangement. Both the spade and spacer ring are kept in the piping system at all times. One is always installed between the flanges while the other is stored on a hinge or retention bracket adjacent to the connection. Switching between flow and isolation is a matter of loosening the flange bolts, swapping the two components, and re-tightening. The process doesn't require removing the flange or cutting the pipe.

Positive isolation is the engineering reason spade ring spacers exist as a category separate from valve isolation. A closed valve provides isolation in normal operation, but valves can leak through seat and seal wear. For maintenance isolation where the intent is to create a barrier that a worker can rely on absolutely before entering a confined space, breaking into a pressure system, or working on equipment that connects to the pipeline, a blind spade provides a physical barrier that a leaking valve cannot. Most safety regulations and permit-to-work procedures for hot work and confined space entry require positive isolation by spectacle blind, spade, or physical disconnection rather than valve isolation alone.

Visual confirmation of line status is a practical advantage in complex process plant environments. The handle tab of whichever component is currently installed extends visibly outside the flange bolts. Walking down a line and checking which component is installed in each spade location gives an unambiguous status reading without gauges, valve position indicators, or instrument readings. In refineries and petrochemical plants with dense piping, that visual clarity has direct safety value.

Pressure rating is set by thickness calculation for each specific spade based on the pipe size and pressure class. A spade for a large-diameter high-pressure line is considerably thicker and heavier than one for a small-bore low-pressure application. PM Industries calculates spade thickness to applicable code requirements and confirms that the specified material grade meets the strength requirements for each combination.

Spade ring spacer flanges are available with full material certification to applicable ASTM, ASME, and process plant standards including NACE MR0175 for sour service. Contact PM Industries for pipe size, pressure class, material grade, and pricing.

Specification Spades ring spacers flanges

Standards	ANSI/ASME B16.5, B16.48, GOST, DIN, EN-1092, B16.47 Series A & B, AWWA, BS Flanges
JIS Standard	5K, 10K, 16K, 20K, 30K, 40K, 63K
DIN Flanges	DIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566

Flanges are Available in Following Materials

Stainless Steel	SS 201, SS 202, SS 301, SS 304, SS 304L, SS 310, SS 310S, SS 316L, SS 316TI, SS 317, SS 317L, SS 321, SS 347, SS 409, SS 409M, SS 409L, SS 410, SS 410S, SS 420, SS 430, SS 431, SS 441, SS 444, SS 446, SS 17-4PH, SS 904L.
Duplex Steel	UNS S32205, UNS S31803 Flange
Super Duplex Steel	UNS S32750, UNS S32760 Flanges
Carbon Steel	Carbon steel A105 Flanges, A36 Flanges, IS 2062 Flanges, A350 LF2 Flanges, F42 Flanges, F52 Flanges, F56 Flanges, F60 Flanges, F65 Flanges, F70 Flanges, F80 Flanges, IBR flanges, A694 Flanges, SS400, SF440, ST37-2 Flanges, S235JrG2 Flanges, P250GH Flanges, C22.8 Flanges, etc.
Alloys Steel	Alloy 20, F1, F5, F9, F11, F22, F91 Flanges
Copper Alloys	Cu-Ni 70/30, Cu-Ni 90/10, C 24000, C 75700, C 51100, C 22000, C 27200, C 21000, C 26800, C 52100, C 77000, C 52000, C 11000, C 74500, C 23000, C 28000, C 12200, C 76400, C 51900, C 75400, C 26000, C 51000, C 10200, C 27000
Nickel Alloys	Nickel 200, 201
Inconel	Inconel 600, 601, 625, 718, 800, 825, X-750
Monel	Monel 400, k500
Hastelloy	Hastelloy C-22, C-276, C-4, X
Titanium	Grade 1, 4, 5(Ti 6Al-4V), 6(Ti 5Al-2.5Sn), 7, 11, 6Al-2Sn-4Zr-2Mo, Grade 12, 6Al-6V-25n, Grade 23(Ti 6AL-4V ELI), 8Ai-1Mo-1V, Grade 5 ELI, Grade 9(3Al-2.5V), 6Al-7Nb.
Aluminium	6063, 1100, 6082 A96082, 1050, 2017, 2024 A92024, 7050 A97050, 5083 A95083, 2014A A92014, 2011 A92011, 6061 A96061 A86061, 5754, 7085, 2050, 7071 7020, 7178, 5052 A95052, 7150, 7075 A97075 A87075, 7575, 2219, 7175
Pressure Rating	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Types	Threaded, Plate, Screwed, Forged.
Supporting material	Gasket, Ring Joint, Flange Bolts
Size range	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
High Temperature	Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature	Above -29 Degree C (−20°F)
Production technique	Forged, machined and Heat treated
Custom design	As per your drawing
Origin	Indian / USA / Korean / West Europe / Japan
Pressure Class	PN 6 TO PN 100
Coating/Surface Treatment:	Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard Flanges	Available
Test	Direct-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
Marking Standard	Name of Manufacturer
	Schedule
	Type of Flange Facing
	Pressure Class
	Nominal Pipe Size, etc
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
	Raw Materials Certificate
	100% Radiography Test Report
	Third Party Inspection Report, etc

ASME B16.48 150# Spades ring spacers flanges Dimension

Normal Pipe Size	Outer Diameter A	Inner Diameter B	Center to End C	Thickness t	Handle Width W
1/2	45	16	126	3	32
18	546	457	427	25.4	51
1	64	27	136	3	32
1.1/4	73	42	145	6.4	32
1.1/2	83	48	145	6.4	32
2	102	61	155	6.4	32
3/4	54	21	131	3	32
2.1/2	107	73	170	6.4	32
3	133	89	170	6.4	32
4	172	114	202	9.7	38
5	194	141	225	9.7	38
6	219	168	225	12.7	38
8	276	219	267	12.7	38
10	337	273	322	15.7	44
24	714	610	512	31.8	51
12	406	324	357	19.1	44
14	448	356	378	19.1	44
16	511	406	410	22.4	44
20	603	508	455	28.4	51
3.1/2	159	102	202	9.7	38

Dimensions Of Class 300 Paddle Blinds Spacers

Normal Pipe Size	Outer Diameter A	Inner Diameter B	Center to< End C	Thickness t	Handle Width W
3.1/2	162	102	205	12.7	38
3/4	64	21	136	6.4	32
1	70	27	139	6.4	32
1.1/4	79	42	150	6.4	32
1.1/2	92	48	150	6.4	32
2	108	61	158	9.7	32
1/2	51	16	129	6.4	32
2.1/2	127	73	177	9.7	32
3	146	89	177	9.7	32
4	178	114	205	12.7	38
5	213	141	240	15.7	38
6	248	168	240	15.7	38
8	305	219	281	22.4	38
10	359	273	333	25.4	44
14	483	356	395	31.8	44
16	536	406	422	38.1	44
18	594	457	450	41.1	51
20	651	508	480	44.5	51
24	772	610	540	50.8	51
12	419	324	363	28.4	44

Pipe Flanges Spacer Ring Class 600 Dimension Standard

Normal Pipe Size	Outer Diameter. A	Inner Diameter B	Center to End C	Thickness t	Handle Width W
3.1/2	159	96	211	15.7	38
3/4	64	21	136	6.4	32
1	70	27	139	6.4	32
1.1/4	79	37	150	9.7	32
1.1/2	92	43	150	9.7	32
2	108	55	158	9.7	32
1/2	51	16	129	6.4	32
2.1/2	127	67	177	12.7	32
3	146	83	177	12.7	32
24	787	597	547	73.2	51
4	191	108	211	15.7	38
5	238	135	248	19.1	38
20	679	497	493	63.5	51
6	264	162	248	22.4	38
8	318	212	288	28.4	38
10	397	265	352	35.1	44
12	454	315	381	41.1	44
14	489	346	398	44.5	44
16	562	397	435	50.8	44
18	610	448	459	53.8	51

900# Stainless Steel Ring Spacers Dimension Table

Normal Pipe Size	Outer Diameter A	Inner Diameter B	Center to End C	Thickness t	Handle Width W
1/2	61	16	135	6.4	32
2.1/2	162	63	190	15.7	32
1	76	27	142	9.7	32
1.1/4	86	35	151	9.7	32
1.1/2	95	41	151	12.7	32
3/4	67	21	137	9.7	32
2	140	53	174	12.7	32
24	899	575	603	111.3	51
3	172	78	190	19.1	32
4	206	102	219	22.4	38
5	251	128	256	28.4	38
6	279	154	256	35.1	38
10	432	255	370	50.8	44
12	518	303	412	60.5	44
14	575	333	442	66.5	44
16	638	381	472	76.2	44
8	349	203	303	41.1	38
18	702	429	504	85.9	51
20	752	478	530	95.3	51

ASME B16.48 Ring Spacer Dimension

Normal Pipe Size	Outer Diameter A	Inner Diameter B	Center to End C	Thickness t	Handle Width W
5	276	128	273	35.1	38
1/2	67	16	137	9.7	32
3/4	73	21	140	9.7	32
8	384	198	321	53.8	38
1.1/4	102	35	161	12.7	32
1.1/2	114	41	161	15.7	32
2	143	53	175	15.7	32
1	83	27	145	9.7	32
2.1/2	165	63	201	19.1	32
12	546	289	427	79.2	44
3	194	78	201	22.4	32
4	232	102	232	28.4	38
6	314	154	273	41.1	38
10	473	248	390	66.5	44

Stainless Steel Paddle Blanks Weight Chart

NPS	Outer Diameter	Schedule 10	Schedule 20	Schedule 30	Std. Wall	Schedule 40	Schedule 60	Extra Strong	Schedule 80	Schedule 100	Schedule 120	Schedule 140	Schedule 160	Double Extra Strong
3/4”	1.050	0.884			0.824	0.824		0.742	0.742				0.612	0.434
1”	1.315	1.097			1.049	1.049		0.957	0.957				0.815	0.599
1.1/4”	1.660	1.442			1.380	1.380		1.278	1.278				1.160	0.896
1/2”	0.840	0.674			0.622	0.622		0.546	0.546				0.464	0.252
1.1/2”	1.900	1.682			1.610	1.610		1.500	1.500				1.338	1.100
5”	5.563	5.295			5.047	5.047		4.813	4.813		4.563		4.313	4.063
2.1/2”	2.875	2.635			2.469	2.469		2.323	2.323				2.125	1.771
14”	14.000	13.500	13.376	13.250	13.250	13.124	12.812	13.000	12.500	12.124	11.814	11.500	11.188
3-1/2”	4.000	3.760			3.548	3.548		3.364	3.364					2.728
36”	36.000	35.376	35.000	34.750	35.250	34.500		35.000
6”	6.625	6.357			6.065	6.065		5.761	5.761		5.501		5.187	4.897
8”	8.625	8.329	8.125	8.071	7.981	7.981	7.813	7.625	7.625	7.437	7.187	7.001	6.813	6.875
3”	3.500	3.260			3.068	3.068		2.900	2.900				2.624	2.300
10”	10.750	10.420	10.250	10.136	10.020	10.020	9.750	9.750	9.562	9.312	9.062	8.750	8.500	8.750
4”	4.500	4.260			4.026	4.026		3.826	3.826		3.624		3.438	3.152
2”	2.375	2.157			2.067	2.067		1.939	1.939				1.687	1.503
12”	12.750	12.390	12.250	12.090	12.000	11.938	11.626	11.750	11.374	11.062	10.750	10.500	10.126	10.750
16”	16.000	15.500	15.376	15.250	15.250	15.000	14.688	15.000	14.312	13.938	13.564	13.124	12.812
18”	18.000	17.500	17.376	17.124	17.250	16.876	16.500	17.000	16.124	15.688	15.250	14.876	14.438
20”	20.000	19.500	19.250	19.000	19.250	18.812	18.376	19.000	17.938	17.438	17.000	16.500	16.062
24”	24.000	23.500	23.250	22.876	23.250	22.624	22.062	23.000	21.562	20.938	20.376	19.876	19.312
30”	30.000	29.376	29.000	28.750	29.250			29.000
42”	42.000				41.250			41.000

Pressure ratings of Spades ring spacers flanges

Temperature (F°)	150 LB	300 LB	400 LB	600 LB	900 LB	1500 LB	2500 LB
-20 to 100	285	740	985	1480	2220	3705	6170
700	110	530	710	1060	1590	2655	4425
300	230	655	870	1310	1965	3270	5450
400	200	635	845	1265	1900	3170	5280
500	170	605	805	1205	1810	3015	5025
600	140	570	755	1135	1705	2840	4730
200	260	680	905	1360	2035	3395	5655
650	125	550	730	1100	1650	2745	4575
750	95	505	675	1015	1520	2535	4230
800	80	410	550	825	1235	2055	3430
850	65	320	425	640	955	1595	2655
950	35	135	185	275	410	685	1145
1000	20	85	115	170	255	430	715
900	50	230	305	460	690	1150	1915

Dimension Tolerance of Spacer Blind Flange

Outside Diameter ≤ 24 = 1.6 MM | > 24 = ± 3.2 MM	Inside Diameter not applicable
Dia of Counterbore not applicable	Drilling Bolt Circle = 1.6 MM | Spacing of Bolt Hole = ± 0.8 MM Bolt Circle Eccentricity with Respect to Facing ≤ 2½ = 0.8 MM maximum | ≥ 3 = 1.6 MM maximum
Diameter of Contact Face 1.6 MM Raised Face = ± 0.8 MM 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 MM	Outside Dia of Hub ≤ 12 = + 2.4 MM/ – 1.6 MM | ≥ 14 = ± 3.2 MM
Thickness ≤ 18 = + 3.2 MM / – 0 | ≥ 20 = + 4.8 MM / – 0	Length through Hub ≤ 18 = + 3.2 MM / – 0.8 MM | ≥ 20 = + 4.8 MM / – 1.6 MM