Flat Face Flange

Teshi Fittings, a premier manufacturer of pipe fittings, offers high-quality Flat Face Flanges designed for various industries including Petroleum, Chemical, Hydraulic, Food, and more. Crafted with meticulous precision and adherence to international quality standards, our Flat Face Flanges provide reliable and leak-proof connections for piping systems. With a commitment to excellence and customer satisfaction, Teshi Fittings delivers superior performance and durability in every flange, offering tailored solutions to meet specific project requirements. Experience the difference with Teshi Fittings’ Flat Face Flanges and trust in our expertise for all your piping needs.

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Standard Specification of Flat Face Flange

Dimensions	ANSI B16.5, ANSI B16.47 Series A & B, ASA, API-605, MSS SP44, AWWA, Custom Drawings
Size	1/2″ (15 NB) to 48″ (1200NB)
Flange Face Types / Connection Type	Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
DIN	DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
BS	BS4504 , BS4504, BS1560, BS10
Class	150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
Class / Pressure Rating	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Material & Grades of Flat Face Flange

Stainless Steel	ASTM A-479, A-182, 304, 304L,304H,304S, 316, 316L,316 Ti, 316H, 309, 310, 310S, 317L, 321, 347, 409, 410, 420, 430, 440, 446, 904L. etc.
Duplex & Super Duplex Steel	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 & ASTM / ASME A/SA 182, A240 F 44, F 45, F51, F 53, F 55, F 60, F 61
Carbon Steel	ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Low Temperature Carbon Steel	ASTM A350, LF2, LF3
Alloy Steel	ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Nickel Alloy	Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II)

Dimension of Flat Face Flange

NPS	Dia. of Pipe		Flange Inner Dia.	Number of holes	Flange Diameter	Flange Thickness	Bolt Circle Dia	Bolt Holes Dia	Weight (Approx)
DN	ISO	DIN	D5	BN	D	b	K	d2	KG/PCS
10	–	14	14.5	4	90	16	60	14	0.7
10	17.2	–	17.7	4	90	16	60	14	0.69
15	–	20	21	4	95	16	65	14	0.77
15	21.3	–	22	4	95	16	65	14	0.77
20	–	25	26	4	105	18	75	14	1.06
20	26.9	–	27.6	4	105	18	75	14	1.05
25	–	30	31	4	115	18	85	14	1.27
25	33.7	–	34.4	4	115	18	85	14	1.25
32	–	38	39	4	140	18	100	18	1.86
32	42.4	–	43.1	4	140	18	100	18	1.83
40	–	44.5	45.5	4	150	18	110	18	2.12
40	48.3	–	49	4	150	18	110	18	2.09
50	–	57	58.1	4	165	20	125	18	2.78
50	60.3	–	61.1	4	165	20	125	18	2.74
65	76.1	–	77.1	8	185	22	145	18	3.48
80	88.9	–	90.3	8	200	24	160	18	4.33
100	–	108	109.6	8	235	24	190	22	5.82
100	114.3	–	115.9	8	235	24	190	22	5.61
125	–	133	134.8	8	270	26	220	26	7.91
125	139.7	–	141.6	8	270	26	220	26	7.6
150	–	159	161.1	8	300	28	250	26	10.12
150	168.3	–	170.5	8	300	28	250	26	9.58
175	193.7	–	196.1	12	350	32	295	30	14.45
200	219.1	–	221.8	12	375	34	320	30	16.9
250	–	267	270.2	12	450	38	385	33	27.28
250	273	–	276.2	12	450	38	385	33	26.51
300	323.9	–	327.6	16	515	42	450	33	36.38
350	355.6	–	359.7	16	580	46	510	36	52.83
350	–	368	372.2	16	580	46	510	36	50.24
400	406.4	–	411	16	660	50	585	39	74.71
400	–	419	423.7	16	660	50	585	39	71.44
500	508	–	513.6	20	755	52	670	42	86.87
600	610	–	616.5	20	890	54	795	48	121.84
700	711	–	716	24	995	58	900	48	150.93
800	813	–	818	24	1140	64	1030	56	219.08
900	914	–	920	28	1250	70	1140	56	271.16
1000	1016	–	1022	28	1360	78	1250	56	344.95

Manufacturing process and features of Flat Face Flange

Manufacturing Process:

Material Selection : Choose suitable materials such as carbon steel, stainless steel, or alloy steel based on the intended application’s requirements. Material selection is crucial for ensuring the flange’s strength, durability, and resistance to corrosion.
Cutting : Raw material is cut into specific shapes and sizes using techniques such as sawing, laser cutting, or water jet cutting. This forms the initial flange blank.
Forging : The cut blanks are heated and shaped under high pressure using forging processes. Forging enhances the material’s strength and structural integrity by aligning its grain structure.
Machining : The forged blanks are machined to precise dimensions using CNC machines or other precision machining tools. This process includes creating the flange face, boring the central hole, and drilling bolt holes according to the required specifications.
Surface Finishing : Surface finishing treatments such as grinding, polishing, or coating are applied to improve the flange’s surface quality, appearance, and corrosion resistance. Common coatings include galvanizing, painting, or applying a protective oxide layer.
Heat Treatment : Depending on the material and application, the flanges may undergo heat treatment processes such as annealing, quenching, and tempering to enhance their mechanical properties, including toughness and hardness.
Inspection and Quality Control : Flanges are subjected to rigorous quality control checks, including dimensional inspections, pressure testing, and material verification, to ensure they meet industry standards and specifications.
Marking and Packaging : Once inspected and approved, the flanges are marked with essential information such as size, material grade, pressure rating, and standards. They are then packaged appropriately for storage and transportation.

Features of Flat Face Flange :

Flat Face Design : The flange face is completely flat, providing a wide sealing surface that is ideal for mating with other flat-faced flanges or equipment.
Material Versatility : Available in various materials, including carbon steel, stainless steel, and alloy steel, to suit different applications and environments.
Corrosion Resistance : Depending on the material and surface treatment, flat face flanges offer excellent resistance to corrosion, making them suitable for harsh environments.
High Strength : Forged and heat-treated to enhance mechanical properties, ensuring the flange can withstand high-pressure and high-temperature conditions.
Leak-Free Sealing : The flat face design ensures a uniform and tight seal when bolted together with a gasket, minimizing the risk of leaks.
Standard Compliance : Manufactured to comply with industry standards such as ANSI, ASME, and DIN, ensuring compatibility and reliability.
Ease of Installation : Designed for straightforward installation and maintenance, with precise dimensions for easy alignment during assembly.
Versatile Applications : Suitable for a wide range of applications in various industries, including oil and gas, chemical processing, water treatment, and power generation.
Durability : Built to last with high-quality materials and manufacturing processes, ensuring long-term performance and reliability.

Application Of Flat Face Flange

Oil and Gas Industry	Used in pipelines, refineries, and offshore platforms for connecting pipes, valves, and other equipment.
Chemical Processing	Employed in chemical plants for handling corrosive fluids and gases, providing reliable connections in aggressive environments.
Water Treatment	Utilized in water treatment facilities for connecting pipelines that transport treated water, chemicals, and slurry.
Power Generation	Found in power plants for connecting steam and boiler systems, ensuring secure and leak-free connections under high pressure and temperature.
HVAC Systems	Used in heating, ventilation, and air conditioning systems for connecting ducts and pipes, ensuring efficient fluid and air transport.
Food and Beverage Processing	Applied in food processing plants for connecting sanitary piping systems, ensuring hygienic and leak-free connections.
Pharmaceutical Industry	Used in pharmaceutical manufacturing facilities for connecting pipes in sterile environments, ensuring clean and leak-free connections.
Marine Applications	Employed on ships and offshore platforms for connecting pipelines that transport fluids and gases, providing durable and corrosion-resistant connections.
General Industrial Use	Suitable for various industrial applications requiring reliable, durable, and leak-free connections.