Hastelloy C22 Type 01 Flange

On February 13, 2025, we received an order for Hastelloy C22 Type 01 flange from a long-standing Italian client.

Information of Order：

Material Standard: UNS N06022 (HASTELLOY C22)

Size : DN40

Pressure: PN16/40

Production Standard: EN 1092-1

Sealing Surface Type: Type B Convex Surface

Upon receiving an order, we prioritize surface quality and dimensional accuracy, adhering to the principle of “quality first” and rigorously controlling every stage of production.

What is a Type 01 flange?

Type 01 plate flanges are the most common type of pipe connection. They consist of a simple flat ring that is bolted to a mating flange, securely joining two sections of a piping system. Due to their simple structure, low cost, and ease of installation, they are widely used in low-pressure piping systems carrying media such as water and air that do not require high pressure.

Inspection:

✅Outer Diameter: This refers to the maximum diameter of the entire flange face, determining the overall dimensions of the flange and the space required for installation.

✅Inner Diameter: This is the diameter of the central borehole in the flange, which must match the inner diameter of the connecting pipe to ensure smooth flow of the medium.

✅Thickness: The overall thickness of the flange directly affects its pressure rating; thicker flanges typically offer higher strength.

✅Bolt Hole Diameter: This aperture must accommodate the shaft diameter of connecting bolts, allowing smooth insertion while preventing excessive clearance after tightening.

✅Surface Finish: The flange surface should be machined flat, free of cracks, burrs, or other visible defects that compromise sealing integrity.

✅Spectral Analysis: This rapid method analyzes the chemical composition of flange materials to verify compliance with specified alloy standards.

Introduction to Hastelloy C22：

Chemical Composition:

Hastelloy C22 (UNS N06022) is a nickel-chromium-molybdenum-tungsten alloy belonging to the high-end grades of the Hastelloy C series, featuring precisely controlled chemical composition ratios: Nickel serves as the matrix element, ensuring the alloy’s fundamental toughness and corrosion resistance. Chromium content ranges from approximately 20.0-22.5% (enhancing corrosion resistance in oxidizing media such as nitric acid and chromic acid). Molybdenum content is approximately 12.5-14.5% (strengthening corrosion resistance in reducing media like hydrochloric acid and sulfuric acid). Tungsten content of approximately 2.5-3.5% (further optimizes the alloy’s resistance to localized corrosion such as pitting and crevice corrosion), and trace elements including iron and cobalt to balance mechanical properties.

CHEMICAL	LIMITS	Ni	Fe	Mn	C	Si	S	Cr	Mo	P	W	Co	V
Hastelloy C22	MIN	Balance	2.00					20.00	12.50		2.50
	MAX		6.00	0.50	0.02	0.08	0.02	22.50	14.50	0.02	3.50	2.50	0.35

Mechanical Properties:

Hastelloy C-22 exhibits outstanding comprehensive mechanical properties at room temperature, with typical tensile strengths exceeding 690 MPa and yield strengths reaching approximately 276 MPa, while maintaining elongation rates as high as 30%. This combination of high strength and good ductility enables it to withstand heavy loads while remaining amenable to fabrication processes such as cold and hot forming. At elevated temperatures, it maintains good strength and excellent creep resistance, making it suitable for a wide range of demanding service conditions

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
Hastelloy C22	690 min	276 min	30 min

Type 01 Flange Dimension:

EN 1092-1 PN 16 Type 01 Flange Dimension:

DN	Mating dimensions					Bore diameters	Flange thickness
	Outside diameter	Diameter of bolt circle	Diameter of bolt hole	Bolting
	D	K	L	Number	Size	B1	C1
10	90	60	14	4	M12	18.0	14
15	95	65	14	4	M12	22.0	14
20	105	75	14	4	M12	27.5	16
25	115	85	14	4	M12	34.5	16
32	140	100	18	4	M16	43.5	18
40	150	110	18	4	M16	49.5	18
50	165	125	18	4	M16	61.5	20
65	185	145	18	8b	M16	77.5	20
80	200	160	18	8	M16	90.5	20
100	220	180	18	8	M16	116.0	22
125	250	210	18	8	M16	141.5	22
150	285	240	22	8	M20	170.5	24
200	340	295	22	12	M20	221.5	26
250	405	355	26	12	M24	276.5	29
300	460	410	26	12	M24	327.5	32
350	520	470	26	16	M24	359.5	35
400	580	525	30	16	M27	411.0	38
450	640	585	30	20	M27	462.0	42
500	715	650	33	20	M30	513.5	46
600	840	770	36	20	M33	616.5	55
700	910	840	36	24	M33	c	63
800	1 025	950	39	24	M36		74
900	1 125	1 050	39	28	M36		82
1 000	1 255	1 170	42	28	M39	c	90
1 200	1 485	1 390	48	32	M45	—	c
1 400	1 685	1 590	48	36	M45	—
1 600	1 930	1 820	56	40	M52	—
1 800	2 130	2 020	56	44	M52	—
2 000	2 345	2 230	62	48	M56	—
c  To be specified by the purchaser.

To view all dimensions for the EN 1092-1 Hastelloy C22 Type 01 flange, click the link below.

https://www.zzflange.com/category/en-1092-1-dimension/type-01

Hastelloy C22 Type 01 Flange Advantages:

•Excellent corrosion resistance, capable of withstanding various strong oxidizing and reducing media.

•Strong resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking, suitable for demanding operating conditions.

•Simple structure and easy installation reduce construction and maintenance costs.

•Maintains good strength and microstructural stability in high-temperature environments.

•Suitable for a wide range of industrial applications, such as chemical processing, offshore engineering, and environmental protection equipment.

Application of Hastelloy C22 Type 01 Flange:

•Chemical and Petrochemical Industries

•Environmental Protection and Flue Gas Desulfurization (FGD) Systems

•Pharmaceutical Industry

•Pulp and Paper Industry

•Nuclear Fuel Reprocessing and Energy