Carbon Steel Blind Flanges Manufacturer and Supplier in Jakarta, Indonesia

Ismail Flanges is a trusted producer and supplier of Carbon Steel Blind Flanges, meeting the needs of clients in Indonesia from our headquarters in Jakarta. Built to seal off pipeline ends or nozzles, our blind flanges are suitable for pressure testing, isolation, and maintenance in industrial systems. Manufactured in high-quality carbon steel, they provide a good balance of strength and affordability for moderate to high-pressure use. Ismail Flanges provides blind flanges in standard and custom dimensions as per ASME, ANSI, and DIN specifications. Our focus on quality, timely delivery, and customer satisfaction makes us a preferred partner in oil & gas, water treatment, and power industries.

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CS Blind Flange

Blind Carbon Steel Flange

LTCS Blind Flanges

Carbon Steel Blind Flanges consist mainly of iron with between 0.1% and 0.3% carbon, with small amounts of manganese, phosphorus, and sulfur. The mechanical properties depend on grade (e.g., ASTM A105), but generally provide tensile strength of 485–620 MPa and yield strength of 250–415 MPa. They are easily machined and ductile, with reasonable corrosion resistance under coated or painted conditions. Carbon steel blind flanges are useful to apply in temperatures of -29°C to 425°C, and hence they are highly versatile and stable for general industrial purposes.

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Carbon Steel Blind Flanges Specification

Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175
Specification	ASTM A694 / ASME SA694
Size Chart	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
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
Pressure Rating ANSI	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Pressure Calculation in DIN	6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
UNI	6Bar 10Bar 16Bar 25Bar 40Bar
EN	6Bar 10Bar 16Bar 25Bar 40Bar
Coating	Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
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
Connect Type/ Flange 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
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
Manufacturer of	ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange 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) 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 ASTM A694 Ff42 Carbon Steel Flanges The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Grades	Carbon Steel A105, A36,is2062, LF2, F42, F52, F56, F60, F65, F70, F80,

Largest Carbon Steel Blind Flanges Supplier in Indonesia, Jakarta

Ismail Flanges, a leading supplier in Indonesia, Jakarta, offers an extensive selection of Carbon Steel Blind Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.

Contact us to get a quick quote for your requirement.

We offer These Flanges as per DIN, ISO, JIS or ANSI Standard.

Carbon Steel Blind Flanges find applications to seal the end of piping systems or vessel openings so as to isolate flow for pressure testing, maintenance, or expansion in the future. They find extensive use in oil refineries, water pipes, chemical plants, power plants, and fire protection systems. The flanges find particular application in high–pressure systems where a leak-proof seal is important. Carbon steel blind flanges are relatively easy to install and remove, making it easy to access systems when they need to be inspected. Their strength and cost make them an economical and popular selection for general industrial piping purposes.

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Types of Carbon Steel Blind Flanges

Dimensions of Carbon Steel Blind Flanges

Size in In	Size in Millimeter	(OD) Outer Diameter	Flange Thick.	Hub OD	Weld Neck Outer Diameter	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	95	12.7	38	21.3	51	Refer Note	34.9	2	66.7	1.6
3/4	20	115	14.3	48	26.7	56		42.9	2	82.6	1.6
1	25	125	15.9	54	33.4	60		50.8	2	88.9	1.6
1 1/4	32	135	17.5	64	42.2	64		63.5	2	98.4	1.6
1 1/2	40	155	19.1	70	48.3	67		73	2	114.3	1.6
2	50	165	20.7	84	60.3	68		92.1	2	127	1.6
2 1/2	65	190	23.9	100	73	75		104.8	2	149.2	1.6
3	80	210	27	117	88.9	78		127	2	168.3	1.6
3 1/2	90	230	28.6	133	101.6	79		139.7	2	184.2	1.6
4	100	255	30.2	146	114.3	84		157.2	2	200	1.6
5	125	280	33.4	178	141.3	97		185.7	2	235	1.6
6	150	320	35	206	168.3	97		215.9	2	269.9	1.6
8	200	380	39.7	260	219.1	110		269.9	2	330.2	1.6
10	250	445	46.1	321	273	116		323.8	2	387.4	1.6
12	300	520	49.3	375	323.8	129		381	2	450.8	1.6
14	350	585	52.4	425	355.6	141		412.8	2	514.4	1.6
16	400	650	55.6	483	406.4	144		469.9	2	571.5	1.6
18	450	710	58.8	533	457	157		533.4	2	628.6	1.6
20	500	775	62	587	508	160		584.2	2	685.8	1.6
24	600	915	68.3	702	610	167		692.2	2	812.8	1.6

Size of Carbon Steel Blind Flanges

Welding Neck Flange Bores (in inch)
NPS	O D	Sch 10	Sch 20	Sch 30	Std. Wall	Sch 40	Sch 60	Extra Strong	Sch 80	Sch 100	Sch 120	Sch 140	Sch 160	Double Extra Strong
1/2”	0.840	0.674			0.622	0.622		0.546	0.546				0.464	0.252
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
1.1/2”	1.900	1.682			1.610	1.610		1.500	1.500				1.338	1.100
2”	2.375	2.157			2.067	2.067		1.939	1.939				1.687	1.503
2.1/2”	2.875	2.635			2.469	2.469		2.323	2.323				2.125	1.771
3”	3.500	3.260			3.068	3.068		2.900	2.900				2.624	2.300
3-1/2”	4.000	3.760			3.548	3.548		3.364	3.364					2.728
4”	4.500	4.260			4.026	4.026		3.826	3.826		3.624		3.438	3.152
5”	5.563	5.295			5.047	5.047		4.813	4.813		4.563		4.313	4.063
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
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
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
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
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
36”	36.000	35.376	35.000	34.750	35.250	34.500		35.000
42”	42.000				41.250			41.000

Are Custom Sizes Available for Carbon Steel Blind Flanges?

Yes, we offer custom sizes for Carbon Steel Blind Flanges to meet specific project needs. Our team at Ismail Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@ismailflanges.id.

Material Testing

We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.