ANSI /ASME B16.5 Threaded Flange/ANSI /ASME B16.5 Screwed Flanges

Manufacturer of ANSI B16.5 SS Threaded Flange in Mumbai, India, Stainless Steel Screwed flange Suppliers. EN 1092-2 PN16 Threaded Flange Dimensions & MSS SP-44 Reducing Threaded Flange Price List, Stainless Steel Threaded Flange manufacturer in India.

reducing threaded flange ASME B16.5 are meant for both Pipe as well as Flanged Fittings. The specification for the ASME B16.5 Threaded Flanges Standard covers, tolerances, marking, testing, pressure &temperature ratings, materials including methods of designating openings for pipe flanges and flanged fittings. Apart from all these parameters, The specification also cover ASNI 150 threaded flange dimensions and includes the following points:

(1) ASME B16.5 stainless steel threaded flange with pressure rating class designations i.e. class 150, class 300, class 400, class 600, class 900, and class 1500 in a size range between NPS 1/2 up to NPS 24 and npt threaded flange with pressure rating class designation class 2500 is available in sizes NPS 1/2 till NPS 12. The requirements of the threaded weld neck flange have been given in both metric as well as the U.S. Customary units with diameter of bolts and stainless steel threaded flange bolt holes expressed in inch units;

(2) flanged fittings with rating class designation 150 and 300 in sizes NPS 1/2 up until NPS 24, with requirements of these threaded flange din 2566 fittings as mentioned in both metric and U.S. Customary units with diameter of bolts and npt threaded Flanges bolt holes expressed in inch units.

(3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and fittings like the threaded Flanges with rating class designation with threaded reducing Flanges for class 2500 in sizes NPS 1/2 up until  NPS 12. These have been acknowledged in the specification in Non-Mandatory Appendix E section of the threaded Flange pn16 in which only U.S. Customary units are provided.

ASME B16.5 Threaded Flange

ASME B16.5 Screwed Flanges

NPT Threaded Flanges

Mstar Enterprises no need an introduction in the field of Flanges Manufacturing and supplying. We manufacture these flanges in various types, shapes, sizes, dimensions, forms, and material grades. With the use of high-quality raw materials and advanced manufacturing practices, we manufacture these flanges as per client requirements.

A Flange is one of the best piping equipment that used for connecting pipes, valves, pumps, and other equipment to make the piping system. Using flanges help to get easy access for cleaning, modification, and inspection. There are different methods that used to join two flanges with pipes like bolting and welding, etc.

Based on the joining methods, they into different types including Slip-On Flanges, Orifice Flanges, Spectacle Flanges, Lap Joint Flanges, Raised Face Flanges, Ring Joint Flanges, Weld Neck Flanges and Socket Weld Flanges, etc. All these types are manufactured with diverse material grades like Duplex Steel, Super Duplex Steel, Hastelloy, Monel, Inconel, Nickel, Carbon Steel, Alloy Steel, Stainless Steel Flanges, Cupronickel Flanges and more.

Flanges Specification

Flanges Size Chart	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Flanges Standards	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Flanges Pressure Rating ANSI	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Flanges
Flanges Pressure Calculation in DIN	6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Flanges
Coating	Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Flanges
Most common types of Flanges	Forged / Threaded / Screwed / Plate
Flanges Manufacturers in india	ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. Flanges: -BS Flanges, EN Flanges, API 6A Flanges, ANSI Flanges, ASME Flanges, DIN Flanges, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange German (DIN) British standard (BS) DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Flanges B.S: BS4504 , BS3293, BS1560, BS10 AS 2129: Table D; Table E; Table H ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48 ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 American standard (ANSI) The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Flanges Uses & application	Bitumen upgraders. Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids.
Test Certificates	EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc
Production technique	Forged, Heat treated and machined
JIS Flanges	5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Flanges
UNI Flanges	6Bar 10Bar 16Bar 25Bar 40Bar Flanges
EN Flanges	6Bar 10Bar 16Bar 25Bar 40Bar Flanges
Connect Type/ Flanges Face Type	Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Flanges Special design	As per your drawing AS, ANSI, BS, DIN and JIS 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Configurations
Test	Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Equipment	Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Origin	Indian / West Europe / Japan / USA / Korean
Export to	Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

Flanges Dimensions

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What is Flanges?

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DN (inch)	Dimension	ANSI B16.5 Flange Dimensional Sizes 3 to 10 inches Table Chart
125 lbs 150 lbs		300 lbs		400 lbs		600 lbs		900 lbs		1500 lbs		2500 lbs
inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch			mm
3	A	7 1/2	190.5	81/4	209.6	81/4	209.6	8 1/4	209.6	9 1/2	241	10 1/2	267	12	305
	b	15/16	23.8	1 1/8	28.6	11/4	31.8	1 1/4	31.8	1 1/2	38.1	1 7/8	47.6	2 5/8	66.7
	D2	5	127	5	127	5	127	5	127	5	127	5	127	5	127
	D1	6	152.4	6 5/8	168.3	6 5/8	168.3	6 5/8	168.3	71/2	190.5	8	203	9	228.6
	n	4	4	8	8	8	8	8	8	8	8	8	8	8	8
	d	3/4	19	7/8	22.2	7/8	22.2	7/8	22.2	1	25.4	1 1/4	31.8	1 3/8	34.9
3 1/2	A	8 1/2	215.9	9	228.6	9	228.6	9	228.6	–	–	–	–	–	–
	b	15/16	23.8	13/16	30.2	13/8	34.9	13/8	34.9	–	–	–	–	–	–
	D2	5 1/2	139.7	5 /2	139.7	5 1/2	139.7	5 1/2	139.7	–	–	–	–	–	–
	D1	7	177.8	7 1/4	184.2	7 1/4	184.2	7 1/4	184.2	–	–	–	–	–	–
	n	8	8	8	8	8	8	8	8	–	–	–	–	–	–
	d	3/4	19	7/8	22.2	1	25.4	1	25.4	–	–	–	–	–	–
4	A	9	228.6	10	254	10	254	10 3/4	273	11 1/2	292	12 1/4	311	14	356
	b	15/16	23.8	1 1/4	31.7	1 3/8	34.9	1 1/2	38.1	1 3/4	44.4	2 1/8	54	3	76.2
	D2	6 3/16	157.2	6 3/16	157.2	6 3/16	157.2	6 3/16	157.2	6 3/16	157.2	6 3/16	157.2	6 3/16	157.2
	D1	7 1/2	190	7 7/8	200	7 7/8	200	8 1/2	215.9	9 1/4	235	9 1/2	241	10 3/4	273
	n	8	8	8	8	8	8	8	8	8	8	8	8	8	8
	d	3/4	19	7/8	22.2	1	25.4	1	25.4	1 1/4	31.8	1 3/8	34.9	1 5/8	41.3
5	A	10	254	11	279.4	11	279.4	13	330.2	13 3/4	349	14 3/4	375	16 1/2	419
	b	1 5/16	23.8	13/8	34.9	1 1/2	38.1	1 3/4	44.4	2	50.8	2 7/8	73	3 5/8	92.1
	D2	7 5/16	185.7	7 5/16	185.7	7 5/16	185.7	7 5/16	185.7	7 5/16	185.7	7 5/16	185.7	7 5/16	185.7
	D1	8 1/2	215.9	9 1/4	234.9	9 1/4	234.9	10 1/2	266.7	11	279	11 1/2	292	12 3/4	324
	n	8	8	8	8	8	8	8	8	8	8	8	8	8	8
	d	7/8	22.2	7/8	22.2	1	25.4	1 1/8	28.6	1 3/8	34.9	1 5/8	41.3	1 7/8	47.6
6	A	11	279	12 1/2	317.5	12 1/2	317.5	14	355.6	15	381	15 1/2	394	19	483
	b	1	25.4	17/16	36.5	1 5/8	41.3	1 7/8	47.6	2 3/16	55.6	3 1/4	82.6	4 1/4	108
	D2	8 1/2	216	8 1/2	215.9	8 1/2	215.9	8 1/2	215.9	8 1/2	215.9	8 1/2	215.9	8 1/2	216
	D1	9 1/2	241	10 5/8	269.9	10 5/8	269.9	11 1/2	292.1	12 1/2	318	12 1/2	318	14 1/2	368
	n	8	8	12	12	12	12	12	12	12	12	12	12	8	8
	d	7/8	22.2	7/8	22.2	1	25.4	1 1/8	28.6	1 1/4	31.8	1 1/2	38.1	2 1/8	54
8	A	13 1/2	342.9	15	381	15	381	16 1/2	419	18 1/2	470	19	482.6	21 3/4	552
	b	1 1/8	28.6	1 5/8	41.3	1 7/8	47.6	2 3/16	55.6	2 1/2	63.5	3 5/8	92.1	5	127
	D2	10 5/8	269.9	10 5/8	269.9	10 5/8	269.9	10 5/8	269.9	10 5/8	269.9	10 5/8	269.9	10 5/8	269.9
	D1	11 3/4	298.4	13	330.2	13	330.2	13 3/4	349.2	15 1/2	394.2	15 1/2	394.2	17 1/4	438
	n	8	8	12	12	12	12	12	12	12	12	12	12	12	12
	d	7/8	22.2	1	25.4	1 1/8	28.6	1 1/4	31.8	1 1/2	38.1	1 3/4	44.5	2 1/8	54
10	A	16	406.4	17 1/2	444.5	17 1/2	444.5	20	508	21 1/2	546	23	584	26 1/2	673
	b	1 3/16	30.2	1 7/8	47.6	2 1/8	54	2 1/2	63.5	2 3/4	69.8	4 1/4	108	6 1/2	165
	D2	12 3/4	323.8	12 3/4	323.8	12 3/4	323.8	12 3/4	323.8	12 3/4	323.8	12 3/4	323.8	12 3/4	323.8
	D1	14 1/4	361.9	15 1/4	387.4	15 1/4	387.4	17	431.8	18 1/2	470	19	482.6	21 1/4	540
	n	12	12	16	16	16	16	16	16	16	16	12	12	12	12
	d	1	25.4	1 1/8	28.6	1 1/4	31.8	1 3/8	34.9	1 1/2	38.1	2	50.8	2 5/8	66.7

Flange Weight Chart

Flange Weights by Pressure Class and Size
Pipe Size	150 #			300 #			600 #			900 #			1500 #			2500 #
	WN	SO	BLD	WN	SO	BLD	WN	SO	BLD	WN	SO	BLD	WN	SO	BLD	WN	SO	BLD
1/2″	2	1	1	2	1	1	2	2	2	SEE 1500 # WEIGHTS			5	4	4	7	7	7
3/4″	2	2	2	3	3	3	4	3	3	SEE 1500 # WEIGHTS			6	5	6	8	8	8
1″	3	2	2	4	3	3	4	4	4	SEE 1500 # WEIGHTS			9	8	8	12	11	11
1 1/2″	4	3	3	7	6	6	8	7	8	SEE 1500 # WEIGHTS			13	12	13	25	22	23
2″	6	5	5	9	7	8	12	9	10	SEE 1500 # WEIGHTS			25	25	25	42	37	39
2 1/2″	8	7	7	12	10	12	18	13	15	SEE 1500 # WEIGHTS			36	36	35	52	55	56
3″	10	8	9	15	13	16	23	16	20	31	26	29	48	48	48	94	83	86
4″	15	13	17	25	22	27	42	37	41	53	53	54	73	73	73	145	125	130
5″	19	15	20	32	28	35	68	63	68	86	83	87	130	130	140	245	210	225
6″	24	19	26	42	39	50	81	80	86	110	110	115	165	165	160	380	325	345
8″	39	30	45	67	58	81	120	115	140	175	170	200	275	260	300	580	485	530
10″	52	43	70	91	81	124	190	170	230	260	245	290	455	435	510	1075	930	1025
12″	80	64	110	140	115	185	225	200	295	325	325	415	690	580	690	1525	1100	1300
14″	110	90	140	180	165	250	280	230	355	400	400	520	940	NA	975	NA	NA	NA
16″	140	98	180	250	190	295	390	330	495	495	425	600	1250	NA	1300	NA	NA	NA
18″	150	130	220	320	250	395	475	400	630	680	600	850	1625	NA	1750	NA	NA	NA
20″	180	165	285	400	315	505	590	510	810	830	730	1075	2050	NA	2225	NA	NA	NA
22″	225	185	355	465	370	640	720	590	1000	NA	NA	NA	NA	NA	NA	NA	NA	NA
24″	260	220	430	580	475	790	830	730	1250	1500	1400	2025	3325	NA	3625	NA	NA	NA

Flanges in Acc. with EN / DIN/Threaded Flange

Type	EN	DIN
Weld Neck Flanges	11	2627 – 2638
Blind Flanges	05	2527
Threaded Flanges	13	2558 | 2565 – 2569
Flat Flanges for Welding	01	2573 | 2576
Loose Flanges	02	2641 | 2642 | 2655 | 2656
Loose Flanges	04	2673 – 2676
Weld-on Collars	32	2641 | 2642 | 2655 | 2656
Weld Neck Collars	34	2673 – 2676
Slip-on Flanges	12	86029 | 86030
Weld Flanges for Pressure Vessels		28031 | 28033
Lapped Flanges		86037
Welding Flanges		86041
Exhaust gas line Flanges		86044
Special Flanges in accordance with drawings
Flanges for automatic welding processes in acc. with PAS 1057-6

Flange versions

	Flat steel, edgewise, as a flange
	Flat steel, flat, as a tire
	square steel
	Round steel
	Angle steel, thighs outwards
	Angle steel, wide leg to the outside
	Angle steel, narrow leg to the outside
	Angle steel, thighs inside
	Angle steel, wide leg inside
	Angle steel, narrow leg inside
	T-steel, bridge inside
	T-steel, bridge to the outside
	T-steel, foot bent upright
	U-steel, opening to the outside
	U-steel, opening inwards
	Double-T carrier (bent around the X-axis)
	Double-T carrier (bent around the Y-axis)
	Rectangular tube, high edge
	Rectangular tube, flat
	square tube
	round tube

 

FLANGES	EN V-flanges type 11 according to EN 1092-1 PN10, PN16, PN25, PN40, PN63, PN100, PN160	ASTM WN flanges according to ANSI B16.5, ANSI B16.47 series A + B class 150, class 300, class 600, class 900, class 1500, class 2500
BLIND FLANGES	Type 05 according to EN 1092-1 PN10, PN16, PN25, PN40, PN63, PN100	ANSI B16.5, ANSI B16.47 Series A + B class 150, class 300, class 600, class 900, class 1500, class 2500
LOOSE FLANGES, SMOOTH FLANGES, FLARES AND COLLARS	EN 1092-1	different pressure levels according to ANSI B16.5 Slip-on flanges Socket-weld flanges Lap-joint flanges Threaded Long-welding-neck flanges Reducer
VARIOUS SEALING STRIP SHAPES	Form A, Form B1 / B2, Form C, Form D, Form E, Form F, Form G, Form H Linseneindrehung	Raised face Ring type joint (RTJ) Large / small male or female Large / small tongue or groove
MATERIAL GRADES	P250GH 16Mo3, 10CrMo9-10, 13CrMo4-5, X10CrMoVNb9-1 P355QH / QH1 1.4541, 1.4571, 1.4301, 1.4306, 1.4307, 1.4401, 1.4404 1.4948, 1.4878, 1.4550 1.4539, 1.4462, 1.4547, 1.4410	A105N A182 F5, A182 F11, A182 F12, A182 F22, A182 F91, A182 F92 A350 LF2 A694 F52, A694F60, A694 F65 A182 F304 / 304L, A182 F316 / 316L A182 F321, A182 F321H, A182 F304H, A182 F347, A182 F347H A182 F904L, duplex, super duplex

Other Type Of Flanges Manufacturers In India

Flanges Class 150	Flanges Threaded
Flanges Class 300	Flanges With 1/2 Npt
Flanges Class 1500	Flanges With Threaded Hole
Flanges Class 600	Flanges Weight 150#
Flanges Class 900	Flanges Rtj 1500
Flanges Class 2500	Flanges Ring Type Joint
Flanges Pn16	Flanges Flat Face
Flanges Pn10	Flanges Slip On
Flanges Pn40	Flanges Rtj 900
Flanges Pn 160	Flanges Rtj
Flanges Pn 64	Flanges Npt
Flanges Dn150 Pn16	Flanges Jis 5k
Flanges Din 2527	Flanges Jis B2220
Flanges Din En 1092-1	Flanges Jis 10k
Flanges Din 2633	Kf Flanges
Flanges Din 2576	Flanges B16.47
Flanges Asme B16.5 Class 300	Flanges Ansi B16.5 150

Stainless Steel Flanges/Threaded Flange

Standards		ASTM A182
Grade		F201, F202, F301, F302, F304, F304L, F309, F310, F316, F316L, F316LN, F317L, F321, F347, 405, 409, 410, 420, 430, 440C, F904L

Carbon Steel Flanges/Threaded Flange

Standards	ASTM A105, ASTM A350
Grades	Gr. LF2, LF3, ASTM A694 -F42, F46, F48, F50, F52, F56, F60, F65, F70.

Alloy Steel Flanges/Threaded Flange

Standards	ASTM A182 / ASME SA182
Grades	F1, F5, F9, F11, F12, F22, F91

Copper Nickel Alloy Flanges/Threaded Flange

Standards	ASTM / ASME SB 61 / 62 / 151 / 152
Grades	Copper Nickel 90 / 10, Copper Nickel 90 / 10

Duplex & Super Duplex Steel Flanges/Threaded Flange

Standards		ASTM A182
Grade		2205 (F51, S31803 / F60, S32205), SMO254 (F44, S32154), 2507 (F53, S32750 / F55, S32760), Ferralium 255 (F61, S32550).

Nickel Alloy Flanges/Threaded Flange

Standards		ASTM B564 / B182
Grade		200 (N02200), 201 (N02201), Alloy 20 (N08020).

Monel Flanges/Threaded Flange

Standards		ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Grade		Monel 400, Monel K500

Inconel/Incoloy/Threaded Flange

Standards		ASTM B564 / B408/ B425 / A182
Grade		600 (N06600), 601 (N06601), 625 (N06625), 718 (N07718), 800 (N08800), 800H (N08810), 800HT (N08811),825 (N08825), F904L (N08904).

Hastelloy Flanges/Threaded Flange

Standards		ASTM B564 / B572
Grade		C726 (N10276), C4 (N06455), C22 (N06022), C2000 (N06200), X (N06002), B2 (N10665), B3 (N10675).

SMO 254 Flanges/Threaded Flange

Standards		ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Mild Steel Flanges/Threaded Flange

Standards		IS 2062,ANSI B16.5,IS 2002,ANSI B16.5

Titanium Flanges/Threaded Flange

Standards		ASTM B381
Grade		F2, F5 (Ti6AI4V), F7.

Export Destination of Threaded Flange

Exporting Flanges to over 60 countries including Afghanistan, Albania, Andorra, Angloa, Austria, Australia, Bahrain, Bangladesh, Bhutan, Brazil, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Canada, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Madagascar, Mexico, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, New Zealand, North Korea,

Netherlands, Norway, Nigeria, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Sudan, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Venezuela, Vietnam, Yemen, etc.

Supplying Threaded Flange to Following Domestic Cities

Mumbai, Delhi, Kolkata, Chennai, Bengaluru, Hyderabad, Ahmadabad, Pune, Surat, Jaipur, Kanpur, Lucknow, Nagpur, Ghaziabad, Indore, Coimbatore, Kochi, Patna, Kozhikode, Bhopal, Thrissur, Vadodara, Agra, Malappuram, Thiruvananthapuram, Kannur, Ludhiana, Nashik, Vijayawada, Madurai, Varanasi, Meerut, Faridabad, Rajkot, Jamshedpur, Srinagar, Jabalpur, Asansol, Vasai Virar City, Allahabad, Dhanbad, Aurangabad, Amritsar, Jodhpur, Ranchi, Raipur, Kollam, Gwalior, Durg-Bhilainagar, Chandigarh, Tiruchirappalli, Kota, etc.

Industries where we supply Threaded Flange

Chemicals, Petrochemicals, Oil & Natural Gas Organization, Fats, Fertilizers, Sugar Mills & Distilleries, Cement Industries, Ship Builders, Paper Industries, Pumps, Automation, Paints, Steel Industries, etc.

Flanges Exporters India, Flanges Supplier In Mumbai, Flanges Used In Oil And Gas Industry, Flanges Manufacturers in india.

Check Flange Weight Chart And Flanges Pressure Rating & Flanges Specification, Flanges Manufacturers In india.

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