Hastelloy C22 Fittings and Flanges

stress corrosion cracking. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. 

Chemical Composition

GRADE

 

Ni

Cr

p

Si

S

Mn

C

V

Co

W

Fe

ALLOY C-22

Min

BALANCE

20

2.5

2

Max

22.5

0.02

0.08

0.02

0.5

0.015

0.35

0.25

3.5

6

At elevated temperatures, the high chromium level of INCONEL alloy 22 helps it resist oxidation, carburization, and sulfidation. Since it is nickel-base, alloy 22 resists high temperature attack by halides (e.g., chlorides and fluorides). With these attributes, the alloy is widely used to protect steel tubes and other components in coal-fired and waste-to-energy boilers.

Mechanical Properties

Grade

Tensile Strength

Yield Strength

Elongation

[MPA]

[MPA]

(% in 50mm) min

Hastelloy C-22

690

310

45

The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This combination of corrosion resistance makes hastelloy C22 flanges and hastelloy C22 fittings particularly useful in applications where mixed acids are present.

Physical Properties

Grade

Density (g/cm3)

Elastic Modulus (GPa)

Coeff of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Electrical Resistivity (Ωμ.m)

Elastic Modulus (GPa)

Specific Heat (J/Kg.K)

Melting Range

24-100°C

0-100°C

at 100°C

Alloy C-22

8.69

220

12.4

11.1

1.23

206

423

1399

Specification of Flange 

The specified ASTM Standard Specification for Hastelloy C22 Flanges is ASTM B 564 with manufacturing standard such as ANSI/ASME B16.5, B16.47, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc.

According to application and uses in pipes and tubes hastelloy flanges are broadly grouped into different sort, for example, Welding Neck Flange(WNF) & Long Welding Neck Flange(LWNF), Slip-on Flange(SOF), Lap Joint Flange(LJW), Blind Flange, Socket Welding Flange (SWF), Threaded Flange(THW), Plate Flange.

Hastelloy C22 Flanges for the most part has different face type, for example, Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), blind flange, with various class rating as 50 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16,din 2.4856 , 25, 40 & ANSI B16.5.

Specification of Fittings

The specified ASTM Standard Specification for Nickel Alloys Pipe Fitting or hastelloy C22 pipe fittings is ASTM B 366, having Specific manufacturing Standards as ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS-SP-49.

Hastelloy C22 pipe fittings are categorically available are Elbow, Reducer, Tee, Coupling, Bend, Stub End, Cap, Nipple, Washer, Cross, Union etc. which are available in different  types such as Welded, Seamless and Fabricated having thickness range from 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75.

Application

Hastelloy C22 is widely used in the chemical field and petrifaction field, such as the element of chloride organic and catalyze system

  • Nuclear fuel regeneration
  • Pesticide manufacture
  • Phosphoric acid manufacture
  • Acid cleaning system
  • Nuclear fuel reprocessing
  • Sour gas production components
  • Pesticide production components
  • Sulfonating system
  • Tubing heat exchanger
  • Resurfacing welding valve

NOTE: Hastelloy C22 Fittings and Flanges is a registered trademark of Haynes International Inc.

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