Paddle Blind paddle blank Spade & Spacer ASME B16.48

Paddle Blind Manufacturer – Spade & Spacer Supplier

We are a professional manufacturer and global supplier of Paddle Blinds, also known as Paddle Blanks, Spade & Spacer sets, manufactured in accordance with ASME B16.48.These line blinds are designed to provide positive isolation of pipelines, ensuring maximum safety during maintenance, inspection, and shutdown operations in critical industrial systems.

ASME B16.48 paddle blinds are widely used in oil & gas, petrochemical, refinery, chemical processing, power plants, and offshore facilities.

What is a Paddle Blind (Spade) ?

A Paddle Blind is a solid metal plate used to isolate a section of pipe during maintenance or shutdown. It’s designed to fit between two flanges and is used as a single-blind alternative to spectacle blinds in larger-diameter or high-pressure pipelines.

• Spade (Blind Plate): Solid disk that blocks the flow
• Spade is always used together with Spacer (Ring Plate): Open ring to allow flow when inserted

These are typically used in pairs and manually swapped to start or stop flow.

Paddle blind also known as Line Blanks

By itself, the solid side of the spectacle blind is called a line blank, skillet blind, paddle blank, paddle blind, or spade. Whether as half a spectacle blind or used by itself, the line blank forms a positive shut-off. The line is a “wafer style” device, meaning it fits inside the bolt hole circle. To the right you can see a flange spreader being used to prepare a pair of flanges to accept a line blank and two gaskets. In order to maintain the spacing of the flanges when the line is open, a ring spacer is used.

Ring spacers also fit “wafer style” but have a hole, or bore, to allow free flow of the material inside the pipe. The ring spacer is simply there to maintain the gap between the flanges when the line blank is not present.–

Spade and Spacers are part of a family referred to as Line Blinds. Together they perform the same function as a Spectacle Blind as essentially a simplistic valve. The Spade or Spacer is fitted in the line between two flanges and is bolted in place. The Spacer is used when the line is required open and the Paddle Blind or Spade is installed when the line is required to be blocked or closed. To change it from open to closed, only half the bolts need to be removed and the Spade or Spacer is swapped over. The removed bolts are then installed and tightened. The handle protrudes from the pipe and provides an indicator of whether a Spade or Spacer is installed.

Paddle Blind Specification

• Standard Sizes: ½” to 60”
• Pressure Ratings: ASME Class 150 to 2500 lbs
• Design Standard: ASME B16.48 / ASME B16.5 / B16.47
• Flange face:Ring joint,Flat Flace,Raise Face
• Types Available:
  • Paddle Blind (Spade)
  • Paddle Spacer (Ring Spacer)
  • Spectacle Blind (combined form)
• Material Options:
  • Carbon Steel: ASTM A105, A516 Gr.70
  • Stainless Steel: ASTM A182 F304, F316
  • Duplex/Super Duplex: ASTM A182 F51, F53, F55
  • Nickel Alloys: Inconel 625, Monel 400, Hastelloy C276

Sealing Face Finishes – Spades and Spacers

Raised Face, Spiral Finishes

Spiral Sealing Facing

All sealing surfaces feature a spiral finish with Ra 3.2µm-6.3µm surface roughness for optimal performance.

Spades & Ring Spacers 150 Class Flanges Dimensions:

NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W
1/2	45	16	126	3	32
3/4	54	21	131	3	32
1	64	27	136	3	32
1¼	73	42	145	6.4	32
1½	83	48	145	6.4	32
2	102	61	155	6.4	32
2½	107	73	170	6.4	32
3	133	89	170	6.4	32
3½	159	102	202	9.7	38
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
12	406	324	357	19.1	44
14	448	356	378	19.1	44
16	511	406	410	22.4	44
18	546	457	427	25.4	51
20	603	508	455	28.4	51
24	714	610	512	31.8	51
NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W

Spades Ring Spacers 300 Class Flanges Dimensions:

NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W
1/2	51	16	129	6.4	32
3/4	64	21	136	6.4	32
1	70	27	139	6.4	32
1¼	79	42	150	6.4	32
1½	92	48	150	6.4	32
2	108	61	158	9.7	32
2½	127	73	177	9.7	32
3	146	89	177	9.7	32
3½	162	102	205	12.7	38
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
12	419	324	363	28.4	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
NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W

Spades Ring Spacers 600 Class Flanges Dimensions:

NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W
1/2	51	16	129	6.4	32
3/4	64	21	136	6.4	32
1	70	27	139	6.4	32
1¼	79	37	150	9.7	32
1½	92	43	150	9.7	32
2	108	55	158	9.7	32
2½	127	67	177	12.7	32
3	146	83	177	12.7	32
3½	159	96	211	15.7	38
4	191	108	211	15.7	38
5	238	135	248	19.1	38
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
20	679	497	493	63.5	51
24	787	597	547	73.2	51
NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W

Spades Ring Spacers 900 Class Flanges Dimensions:

NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W
1/2	60	16	134	6.4	32
3/4	67	21	137	6.4	32
1	76	27	142	6.4	32
1¼	86	37	151	9.7	32
1½	95	43	151	9.7	32
2	140	55	174	12.7	32
2½	162	67	186	12.7	32
3	165	83	186	15.7	32
4	203	108	217	19.1	38
5	244	135	259	22.4	38
6	286	162	259	25.4	38
8	356	212	307	35.1	38
10	432	265	370	41.1	44
12	495	315	401	47.8	44
14	518	346	412	53.8	44
16	572	397	440	60.5	44
18	635	448	471	66.5	51
20	696	497	501	73.2	51
24	835	597	571	88.9	51
NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W

Spades Ring Spacers 1500 Class Flanges Dimensions:

NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W
1/2	61	16	135	6.4	32
3/4	67	21	137	9.7	32
1	76	27	142	9.7	32
1¼	86	35	151	9.7	32
1½	95	41	151	12.7	32
2	140	53	174	12.7	32
2½	162	63	190	15.7	32
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
8	349	203	303	41.1	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
18	702	429	504	85.9	51
20	752	478	530	95.3	51
24	899	575	603	111.3	51
NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W

Spades Ring Spacers 2500 Class Flanges Dimensions:

NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W
1/2	67	16	137	9.7	32
3/4	73	21	140	9.7	32
1	83	27	145	9.7	32
1¼	102	35	161	12.7	32
1½	114	41	161	15.7	32
2	143	53	175	15.7	32
2½	165	63	201	19.1	32
3	194	78	201	22.4	32
4	232	102	232	28.4	38
5	276	128	273	35.1	38
6	314	154	273	41.1	38
8	384	198	321	53.8	38
10	473	248	390	66.5	44
12	546	289	427	79.2	44
NPS	Outside Ø A	Inside Ø B	Center to End C	Thickness t	Handle Width W

⬇️ Download Paddle Blank Spade Spacer Dimension ASME B16.48 CL150

⬇️ Download Paddle Blank Spade Spacer Dimension ASME B16.48 CL 300

⬇️ Download Paddle Blank Spade Spacer Dimension ASME B16.48 CL 600

⬇️ Download Paddle Blank Spade Spacer Dimension ASME B16.48 CL 900

⬇️ Download Paddle Blank Spade Spacer Dimension ASME B16.48 CL 1500

⬇️ Download Paddle Blank Spade Spacer Dimension ASME B16.48 CL 2500

⬇️ Download ASME B16.48 standard latest edition (PDF)

We can supply the Paddle Spade and Spacer according Shell,Aramco Standard.

Pressure Designation: ASME CL900
Size: DN750
Design Standard: ASME B16.48
Flanges: ASME B16.47 SERIES A
Mandatory Requirements MESC SPE 76/012 2020, MESC SPE 76/222 2020
Inspection Certificate: EN 10204-3.1, ISO 10474-3.1