ANSI B16.5 ASTM B381 Titanium Blind Flange

Specifications : ASTM B381 / ASME SB381
Standard : ANSI / ASME B16.5
Size : 1/8" NB to 48" NB
Pressure : 150#
Wall thickness: SCH5S-SCHXXS
Material: Titanium and titanium alloys

INQUIRY

PRODUCT DETAIL

A titanium blind flange (BL flange) is a flange which has no bore, and is used to close ends of piping systems. A blind flange also permits easy access to a line once it has been sealed. The blind flanges are sometimes machined to accept a pipe of the nominal size to which reduction is being made. The reduction can be either threaded or welded. One of its functions is to block the end of the pipeline, and the other is to facilitate the removal of debris in the pipeline during maintenance. As far as plugging effect is concerned, it has the same effect as the head and cap. But the head can not be disassembled, and the blind flange is fixed by bolts, which is very convenient to disassemble. Blind flanges are made of carbon steel, alloy steel, stainless steel, plastic, etc.

Size: 1/2″ – 56″ (DN15 to DN1,400)
Pressure:
American standard series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500
European standard series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400
Flange Facing Types: American series: Flat Face(FF), Raised Face(RF), Groove(G), Male and Female Face(MFM), Ring Type Joint (RTJ)
Material: Gr1 (3.7025), Gr2 (3.7035), Gr7 (3.7235), Gr12 (3.7105)
Standard:
GB/T9112-2000
GB/T9116 1-2000 GB/T9116 2-2000 GB/T9116 3-2000 GB/T9116 4-2000
GB/T9124-2000
SH/T3406-1996
GD2000 GD87-1101
HG/T20592-2009 HG/T20614-2009
HG/T20615-2009 HG/T20623-2009 HG/T20635-2009
ASME B16.5-2009
EN1092-1-2007 EN1759-1-2004
BS 1560-3 1-1989 BS 4504-3 1-1989
AFNOR NF E29-200-1-2007
ISO 7005-1-1992
AS2219-2000
JIS B2220-2004

China Titanium Blind Flange manufacturer Titanium information group supplies ANSI B16.5 ASTM B381 Titanium Blind Flange.

Blind flange dimensions are covered in ASME B16.5 – which covers Pipe Flanges and Flanged Fittings for size NPS ½” to 24” for above NPS 26” to 60” it should be as per ASME B16.47.

During dimensional inspection of flange, you should check for

Outer Diameter of body
Bolt Circle & Bolt hole Diameter
Straightness and alignment of the bolt hole
Thickness of the Blind

Table of Contents

Class 150 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	90	9.6	34.9	2	60.3	4	1/2	50	55	5/8	M14	0.9
3/4	20	100	11.2	42.9	2	69.9	4	1/2	50	65	5/8	M14	0.9
1	25	110	12.7	50.8	2	79.4	4	1/2	55	65	5/8	M14	0.9
1 1/4	32	115	14.3	63.5	2	88.9	4	1/2	55	70	5/8	M14	1.4
1 1/2	40	125	15.9	73	2	98.4	4	1/2	65	70	5/8	M14	1.8
2	50	150	17.5	92.1	2	120.7	4	5/8	70	85	3/4	M16	2.3
2 1/2	65	180	20.7	104.8	2	139.7	4	5/8	75	90	3/4	M16	3.2
3	80	190	22.3	127	2	152.4	4	5/8	75	90	3/4	M16	4.1
3 1/2	90	215	22.3	139.7	2	177.8	8	5/8	75	90	3/4	M16	5.9
4	100	230	22.3	157.2	2	190.5	8	5/8	75	90	3/4	M16	7.7
5	125	255	22.3	185.7	2	215.9	8	3/4	85	95	7/8	M20	9.1
6	150	280	23.9	215.9	2	241.3	8	3/4	85	100	7/8	M20	11.8
8	200	345	27	269.9	2	298.5	8	3/4	90	110	7/8	M20	20.5
10	250	405	28.6	323.8	2	362	12	7/8	100	115	1	M24	32
12	300	485	30.2	381	2	431.8	12	7/8	100	120	1	M24	50
14	350	535	33.4	412.8	2	476.3	12	1	115	135	1 1/8	M27	64
16	400	595	35	469.9	2	539.8	16	1	115	135	1 1/8	M27	82
18	450	635	38.1	533.4	2	577.9	16	1 1/8	125	145	1 1/4	M30	100
20	500	700	41.3	584.2	2	635	20	1 1/8	140	160	1 1/4	M30	130
24	600	815	46.1	692.2	2	749.3	20	1 1/4	150	170	1 3/8	M33	196

Class 300 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	95	12.7	34.9	2	66.7	4	1/2	55	65	5/8	M14	1.4
3/4	20	115	14.3	42.9	2	82.6	4	5/8	65	75	3/4	M16	1.4
1	25	125	15.9	50.8	2	88.9	4	5/8	65	75	3/4	M16	1.4
1 1/4	32	135	17.5	63.5	2	98.4	4	5/8	70	85	3/4	M16	1.8
1 1/2	40	155	19.1	73	2	114.3	4	3/4	75	90	7/8	M20	2.7
2	50	165	20.7	92.1	2	127	8	5/8	75	90	3/4	M16	3.7
2 1/2	65	190	23.9	104.8	2	149.2	8	3/4	85	100	7/8	M20	5.5
3	80	210	27	127	2	168.3	8	3/4	90	110	7/8	M20	7.3
3 1/2	90	230	28.6	139.7	2	184.2	8	3/4	95	110	7/8	M20	9.6
4	100	255	30.2	157.2	2	200	8	3/4	95	115	7/8	M20	12.3
5	125	280	33.4	185.7	2	235	8	3/4	110	120	7/8	M20	15.9
6	150	320	35	215.9	2	269.9	12	3/4	110	120	7/8	M20	22.7
8	200	380	39.7	269.9	2	330.2	12	7/8	120	140	1	M24	36
10	250	445	46.1	323.8	2	387.4	16	1	140	160	1 1/8	M27	57
12	300	520	49.3	381	2	450.8	16	1 1/8	145	170	1 1/4	M30	84
14	350	585	52.4	412.8	2	514.4	20	1 1/8	160	180	1 1/4	M30	113
16	400	650	55.6	469.9	2	571.5	20	1 1/4	165	190	1 3/8	M33	134
18	450	710	58.8	533.4	2	628.6	24	1 1/4	170	195	1 3/8	M33	181
20	500	775	62	584.2	2	685.8	24	1 1/4	185	205	1 3/8	M33	230
24	600	915	68.3	692.2	2	812.8	24	1 1/2	205	230	1 5/8	M39	359

Class 400 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	95	14.3	34.9	7	66.7	4	1/2	75	5/8	M14	1.5
3/4	20	115	15.9	42.9	7	82.6	4	5/8	90	3/4	M16	1.5
1	25	125	17.5	50.8	7	88.9	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	20.7	63.5	7	98.4	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	22.3	73	7	114.3	4	3/4	110	7/8	M20	3.7
2	50	165	25.4	92.1	7	127	8	5/8	110	3/4	M16	4.6
2 1/2	65	190	28.6	104.8	7	149.2	8	3/4	120	7/8	M20	6.8
3	80	210	31.8	127	7	168.3	8	3/4	125	7/8	M20	9.1
3 1/2	90	230	35	N/A	7	184.2	8	7/8	140	1	M24	13.2
4	100	255	35	157.2	7	200	8	7/8	140	1	M24	15
5	125	280	38.1	185.7	7	235	8	7/8	145	1	M24	20
6	150	320	41.3	215.9	7	269.9	12	7/8	150	1	M24	28
8	200	380	47.7	269.9	7	330	12	1	170	1 1/8	M27	46
10	250	445	54	323.8	7	387.4	16	1 1/8	190	1 1/4	M30	71
12	300	520	57.2	381	7	450.8	16	1 1/4	205	1 3/8	M33	102
14	350	585	60.4	412.8	7	514.4	20	1 1/4	210	1 3/8	M33	132
16	400	650	63.5	469.9	7	571.5	20	1 3/8	220	1 1/2	M36	168
18	450	710	66.7	533.4	7	628.6	24	1 3/8	230	1 1/2	M36	207
20	500	775	69.9	584.2	7	685.8	24	1 1/2	240	1 3/4	M39	266
24	600	915	76.2	692.2	7	812.8	24	1 3/4	265	1 7/8	M45	405

Class 600 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	95	14.3	34.9	7	66.7	4	1/2	75	5/8	M14	1.4
3/4	20	115	15.9	42.9	7	82.6	4	5/8	90	3/4	M16	1.4
1	25	125	17.5	50.8	7	88.9	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	20.7	63.5	7	98.4	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	22.3	73	7	114.3	4	3/4	110	7/8	M20	3.7
2	50	165	25.4	92.1	7	127	8	5/8	110	3/4	M16	4.6
2 1/2	65	190	28.6	104.8	7	149.2	8	3/4	120	7/8	M20	6.8
3	80	210	31.8	127	7	168.3	8	3/4	125	7/8	M20	9.1
3 1/2	90	230	35	N/A	7	184.2	8	7/8	140	1	M24	13.2
4	100	275	38.1	157.2	7	215.9	8	7/8	145	1	M24	18.7
5	125	330	44.5	185.7	7	266.7	8	1	165	1 1/8	M27	31
6	150	355	47.7	215.9	7	292.1	12	1	170	1 1/8	M27	39
8	200	420	55.6	269.9	7	349.2	12	1 1/8	190	1 1/4	M30	64
10	250	510	63.5	323.8	7	431.8	16	1 1/4	215	1 3/8	M33	105
12	300	560	66.7	381	7	489	20	1 1/4	220	1 3/8	M33	134
14	350	605	69.9	412.8	7	527	20	1 3/8	235	1 1/2	M36	161
16	400	685	76.2	469.9	7	603.2	20	1 1/2	255	1 5/8	M39	225
18	450	745	82.6	533.4	7	654	20	1 5/8	275	1 3/4	M42	286
20	500	815	88.9	584.2	7	723.9	24	1 5/8	285	1 3/4	M42	368
24	600	940	101.6	692.2	7	838.2	24	1 7/8	330	2	M48	568

Class 900 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	120	22.3	34.9	7	82.6	4	3/4	110	7/8	M20	1.8
3/4	20	130	25.4	42.9	7	88.9	4	3/4	115	7/8	M20	2.7
1	25	150	28.6	50.8	7	101.6	4	7/8	125	1	M24	3.6
1 1/4	32	160	28.6	63.5	7	111.1	4	7/8	125	1	M24	4.1
1 1/2	40	180	31.8	73	7	123.8	4	1	140	1 1/8	M27	5.9
2	50	215	38.1	92.1	7	165.1	8	7/8	145	1	M24	10.1
2 1/2	65	245	41.3	104.8	7	190.5	8	1	160	1 1/8	M27	16
3	80	240	38.1	127	7	190.5	8	7/8	145	1	M24	13
4	100	290	44.5	157.2	7	235	8	1 1/8	170	1 1/4	M30	24.5
5	125	350	50.8	185.7	7	279.4	8	1 1/4	190	1 3/8	M33	39.5
6	150	380	55.6	215.9	7	317.5	12	1 1/8	190	1 1/4	M30	53
8	200	470	63.5	269.9	7	393.7	12	1 3/8	220	1 1/2	M36	91
10	250	545	69.9	323.8	7	469.9	16	1 3/8	235	1 1/2	M36	132
12	300	610	79.4	381	7	533.4	20	1 3/8	255	1 1/2	M36	189
14	350	640	85.8	412.8	7	558.8	20	1 1/2	275	1 5/8	M39	237
16	400	705	88.9	469.9	7	616	20	1 5/8	285	1 3/4	M42	273
18	450	785	101.6	533.4	7	685.8	20	1 7/8	325	2	M48	367
20	500	855	108	584.2	7	749.3	20	2	350	2 1/8	M52	463
24	600	1040	139.7	692.2	7	901.7	20	2 1/2	440	2 5/8	M64	875

Class 1500 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	120	22.3	34.9	7	82.6	4	3/4	110	7/8	M20	1.8
3/4	20	130	25.4	42.9	7	88.9	4	3/4	115	7/8	M20	2.7
1	25	150	28.6	50.8	7	101.6	4	7/8	125	1	M24	3.7
1 1/4	32	160	28.6	63.5	7	111.1	4	7/8	125	1	M24	4.1
1 1/2	40	180	31.8	73	7	123.8	4	1	140	1 1/8	M27	5.9
2	50	215	38.1	92.1	7	165.1	8	7/8	145	1	M24	10.1
2 1/2	65	245	41.3	104.8	7	190.5	8	1	160	1 1/8	M27	15.9
3	80	265	47.7	127	7	203.2	8	1 1/8	180	1 1/4	M30	21.8
4	100	310	54	157.2	7	241.3	8	1 1/4	195	1 3/8	M33	33
5	125	375	73.1	185.7	7	292.1	8	1 1/2	250	1 5/8	M39	64
6	150	395	82.6	215.9	7	317.5	12	1 3/8	260	1 1/2	M36	75
8	200	485	92.1	269.9	7	393.7	12	1 5/8	290	1 3/4	M42	136
10	250	585	108	323.8	7	482.6	12	1 7/8	335	2	M48	232
12	300	675	123.9	381	7	571.5	16	2	375	2 1/8	M52	314
14	350	750	133.4	412.8	7	635	16	2 1/4	405	2 3/8	M56	443
16	400	825	146.1	469.9	7	704.8	16	2 1/2	445	2 5/8	M64	591
18	450	915	162	533.4	7	774.7	16	2 3/4	495	2 7/8	M72	795
20	500	985	177.8	584.2	7	831.8	16	3	540	3 1/8	M76	1022
24	600	1170	203.2	692.2	7	990.6	16	3 1/2	615	3 5/8	M90	1648

Class 2500 Blind Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	RF Dia.	RF Height	PCD	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E
1/2	15	135	30.2	34.9	7	88.9	4	3/4	120	7/8	M20	3.2
3/4	20	140	31.8	42.9	7	95.2	4	3/4	125	7/8	M20	3.7
1	25	160	35	50.8	7	108	4	7/8	140	1	M24	5
1 1/4	32	185	38.1	63.5	7	130.2	4	1	150	1 1/8	M27	7.8
1 1/2	40	205	44.5	73	7	146	4	1 1/8	170	1 1/4	M30	10.5
2	50	235	50.9	92.1	7	171.4	8	1	180	1 1/8	M27	18
2 1/2	65	265	57.2	104.8	7	196.8	8	1 1/8	195	1 1/4	M30	25.5
3	80	305	66.7	127	7	228.6	8	1 1/4	220	1 3/8	M33	39
4	100	355	76.2	157.2	7	273	8	1 1/2	255	1 5/8	M39	61.5
5	125	420	92.1	185.7	7	323.8	8	1 3/4	300	1 7/8	M45	102
6	150	485	108	215.9	7	368.3	8	2	345	2 1/8	M52	157
8	200	550	127	269.9	7	438.2	12	2	380	2 1/8	M52	241
10	250	675	165.1	323.8	7	539.8	12	2 1/2	490	2 5/8	M64	470
12	300	760	184.2	381	7	619.1	12	2 3/4	540	2 7/8	M72	575

Disclaimer – Please check with ASME B16.5 Before using.

Titanium slip on flange is widely used in petrochemical, oil and gas, power generation, bulk liquid transportation, chemical, pharmaceutical, pulp and paper, textile and other industries. All our titanium flanges are manufactured according to international standards. The titanium flange shall be packed in such a way that it will not be damaged during shipment. For export, standard export packaging is done in plywood boxes. All titanium flanges are marked with brand, batch number, size, grade and our trademark. We also accept custom markings on titanium flanges

Titanium grades 1, 2, 3 and 4 are commercially pure (at least 99% titanium). The chemical composition of each brand changes slightly, which affects the mechanical properties and design capacity. The corrosion resistance of all four grades is similar. Titanium is light in weight and has strong corrosion resistance. In most environments, its corrosion resistance is higher than that of stainless steel. Of the four commercially pure (c.p.) grades, grade 2 titanium is the preferred alloy for most industrial applications requiring good ductility and corrosion resistance.

Chemical Composition % of Titanium Gr. 2 (UNS R50400/WERKSTOFF NR.3.7035) Blind Flange

STANDARD	CHEMICAL COMPOSITION (weight %, ma√ or range)
Grade	UNS	N	C	H	Fe	O	Al	V	Pd	Mo	Ni
Grade	No	N	C	H	Fe	O	Al	V	Pd	Mo	Ni
GR 1	R50250	0.03	0.08	0.015	0.2	0.18
GR 2	R50400	0.03	0.08	0.015	0.3	0.25
GR 3	R50550	0.05	0.08	0.015	0.3	0.35
GR 4	R50700	0.05	0.08	0.015	0.5	0.4
GR 5	R56400	0.05	0.08	0.015	0.4	0.2	5.5-6.75	3.5-4.5
GR 7	R52400	0.03	0.08	0.015	0.3	0.25			0.12-0.25
GR 9	R56320	0.03	0.08	0.015	0.25	0.15	2.5-3.5	2.0-3.0
GR 12	R53400	0.03	0.08	0.015	0.3	0.25				0.2-0.4	0.6-0.9
GR 23	R56401	0.03	0.08	0.0125	0.25	0.13	5.5-6.5	3.5-4.5

Mechanical Properties of Titanium Gr. 2 (UNS R50400/WERKSTOFF NR.3.7035) Blind Flange

STANDARD	CHEMICAL COMPOSITION (weight %, ma√ or range)	MECHANICAL PROPERTIES (min)
Grade	UNS	Tensile	Yield	El.	Red.
Grade	No	Mpa	Mpa	%	%
GR 1	R50250	240	138	24	30
GR 2	R50400	345	275	20	30
GR 3	R50550	450	380	18	30
GR 4	R50700	550	483	15	25
GR 5	R56400	895	828	10	25
GR 7	R52400	345	275	20	30
GR 9	R56320	620	483	15	25
GR 12	R53400	483	345	18	25
GR 23	R56401	828	759	10	15

TITANIUM GRADE 2 EQUIVALENT GRADES

STANDARD	WERKSTOFF NR.	UNS
Titanium Gr 2	3.7035	R50400

TITANIUM MATERIALS SUPPLY SCOPE
TITANIUM GRADE	UNS NO.	WIRE	BAR	SHEET	PLATE	TUBE	PIPE	FITTING	FORGING	FASTENER
Ti Grade 1	R50250	√	√	√	√	√	√	√	√	√
Ti Grade 2	R50400	√	√	√	√	√	√	√	√	√
Ti Grade 3	R50550	√	√	√	√	√	√	√	√	√
Ti Grade 4	R50700	√	√	√	√	√	√	√	√	√
Ti Grade 5 (6Al 4V)	R56400	√	√	√	√	√	√	√	√	√
Ti Grade 7 (0.2Pd)	R52400	√	√	√	√	√	√	√	√	√
Ti Grade 9 (3Al 2.5V)	R56320	√	√	√	√	√	√	√	√	√
Ti Grade 11	R52250	√	√	√	√	√	√	√	√	√
Ti Grade 12 (0.3Mo 0.8Ni)	R53400	√	√	√	√	√	√	√	√	√
Ti Grade 17	R52252	√	√	√	√	√	√	√	√	√
Ti Grade 23 (6Al 4V Eli)	R56401	√	√	√	√	√	√	√	√	√
Notes 1) √-Available, √-Unavailable
Notes 2) For other grades like Ti6Al2Sn4Zr2Mo, Ti6Al6V2Sn, Ti8Al1Mo1V, Ti6Al2Sn4Zr6Mo, Ti15V3Cr3Sn3Al, please contact us for details.
Notes 3) It may differs a little for materials in different sizes, please also contact us.

Industry and Application

Titanium grade 2 has a low density, so it is ideal where weight may be of concern. Medical and aerospace are two pillar industries of titanium alloy. The strength and corrosion resistance of grade 2 titanium also make it very suitable for marine, chemical processing and desalination industries. Typical applications of grade 2 titanium include oil and gas components, reaction and pressure vessels, piping or piping systems, heat e√changers, linings, flue gas desulfurization systems, and many other industrial components. Continuous operating temperatures up to 800 ° F, with occasional intermittent operation at 1000 ° F.

Corrosion resistance

The C.P. grade corrosion resistance of titanium comes from the strong and stable protective o√ide film formed in the presence of o√ygen. This film enables commercial pure titanium grades to resist most o√idation, neutral and inhibitory reduction, as well as mild reduction environments. Grade 2 has e√cellent corrosion resistance in seawater and marine atmosphere. The corrosion resistance of the four C.P. grades is similar, but the mechanical properties vary with the content of o√ygen and iron. Grade 2 titanium is resistant to corrosion by moist chlorides and metal chlorides, chlorite and hypochlorite solutions, nitric and chromic acids, organic acids, and many gas industrial applications.

Manufacturing and heat treatment

Grade 2 titanium has good ductility and allows cold forming. In order to prevent cold forming problems, the minimum bending radius of materials with thickness less than 0.070 ″ should be 2T, and that of materials with thickness greater than 0.070 ″ should be 2.5t. The material can also be easily processed, hot worked and welded. Hot working shall be performed between 400 ° F and 600 ° F. Stress relief shall be achieved by heating to a temperature between 900 ° F and 1100 ° f followed by forced ventilation or slow cooling. Annealing temperature ranges from 1200 ° f to 1400 ° f for 6 minutes to 2 hours, followed by air cooling.
The welding of grade 2 titanium can be carried out by various methods, such as MIG and TIG. Inert gas protection is very important to prevent o√ygen absorption and embrittlement in welding area. In general, it is best to test the mi√ture of argon and helium before accepting the welding procedure. No preheating or post heat treatment is required.

ANSI B16.5 ASTM B381 Titanium Blind Flange‘s Packing & Shipping

1) Packing Method:

Normal packing: plastic film or bubble paper wrapped on product’s surface ,protect ends with caps , pack with wooden case or load on fumifation plywood pallet .

Custom made as customers request.