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Alloy 22 Pipes, Pipe Fittings & Flanges in Pharmaceutical Plants

Alloy 22 sheet can be readily fabricated into pipes, pipe fittings and flanges. NeoNickel’s alloy 22 is widely used in mechanical design and fabrication of process equipment. On this occasion, alloy 22 pipes, pipe fittings and flanges (fabricated from sheets) were used to upgrade an existing PTFE CAC (Chlorine Acetyl Chloride) transfer line in a pharmaceutical plant. An existing de-commissioned PTFE line was replaced by the alloy 22 line in order to ensure that the system complied with safety requirements. The CAC line was used for transferring chlorine acetyl chloride found in the pharmaceutical products manufacturing process.

Alloy 22 is a fully austenitic, nickel-chromium-molybdenum-tungsten alloy with excellent corrosion resistance. The high chromium content provides good resistance to oxidizing conditions while the molybdenum and tungsten give good resistance to reducing media. This alloy provides exceptional resistance to pitting, crevice corrosion and stress corrosion cracking as well as general corrosion. NeoNickel offer a competitive package of alloy 22 pipes, pipe fittings & flanges with fast response and delivery.

 

 

Corrosion rates in mixed acid media with chlorides & fluorides

Uniform corrosion mils/year

Corrosive media

Temperature

C22

C276

C4

625

6%HF + 5% HNO3

60°C

67

207

204

73

1%HF + 5% HNO3

Boiling point

0.5

8

11

1

25%H2SO4 + 5% HNO3 + 4%NaCl

Boiling point

12

64

97

713

23%H2SO4 + 1.2%HCl + 1% FeCl3 + 1%CuCl3

Boiling point

7

55

2294

3847

 

 

Alloy 22 is widely used in the construction of process equipment in the chemical, fine chemical, pharmaceutical, bio pharm, pesticide and nuclear fuel reprocessing markets. This is because alloy 22 has outstanding corrosion resistance in a wide variety of chemicals including oxidizing acid chlorides, wet chlorine, formic acids, acetic acids, ferric chlorides, cupric chlorides, sea water, brine and other mixed or contaminated chemical solutions (both organic and inorganic). Moreover, alloy 22 resists the formation of grain boundary precipitates in the weld heat affected zone, making the alloy suitable for most chemical process applications in the ‘as-welded’ condition.

Contact NeoNickel for your materials selection, quality controlled, and metallurgical consulting service for similar applications.