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Selection method
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Body、disc specifications
 

Body & disc selection for caustic substance

Caustic substance

Material selection

Low pressure steam

WCB

Stainless steel

Petroleum

Cast Iron

WCB

Crude petroleum

Cast Iron

Bronze

Gasoline

WCB

Bronze

Compressed air

Bronze

Cast Iron

Coal gas

Cast Iron

Bronze

Nitric acid

Stainless steel

 

Oil of vitriol

WCB

High silicon cast iron

 

Material

Working condition

Main medium

Type

Standard

PN / MPa

t / ℃

Grey iron

HT200

≤1.6

≤200

Water, steam, oil

Ductile iron

QT450

≤4.0

≤350

Fine steel casting iron

WCB

≤16

≤450

Acid resisting steel with nickle, chromium, titanium

304

≤6.4

≤200

For caustic substance like nitric acid

—100 ~ —196

Ethylene etc, low temperature medium

≤600

High temperature steam, gas etc

Acid resisting steel with nickle, chromium, molybdenum

316

≤20

≤200

Acetic acid etc

Bronze

 

≤1.6

≤200

Water, steam, gas etc

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