Why stainless steel
grades in pump and valve systems ?
Corrosion resistance in Process Industries
o (Oil
& Gas, Chemicals, Waste and Salt water, etc.);
Pressure and Temperature resistance;
Hygienic requirements in Food & Beverage
Industries
o (Chocolate,
Drinking water, Wine, Milk, etc.);
Life cycle cost
o (Low
maintenance costs).
Which stainless steel grades in pump and valve systems
?
Standard grades :
FERRITIC STEELS (1.4016 –1.4105 – 1.4106
–1.4114) :
o Magnetic
o Low
strain hardening coefficient
o Good
tensile strength at high temperature
MARTENSITIC STEELS (1.4006 > 1.4034 – 1.4005 >1.4035 – 1.4057 –
1.4418) :
o Magnetic
o High
mechanical properties
AUSTENITIC STEELS (1.4307/1.4301 – 1.4541 –
1.4404/1.4401 – 1.4571) :
o Not
or slightly magnetic
o Good
impact test even at low temperature
BUMAX
Bulten Stainless BUMAX 88 and BUMAX 109 (1.4404)
o Slightly
magnetic
o Extremely
high tensile strength compared to 316
o Good
impact test even at low temperature
o Corrosive
resistance 3x standard grades
Special grades :
DUPLEX STEELS (1.4362 – 1.4462 – 1.4507) :
o Excellent
corrosion resistance
o High
mechanical properties
SUPER AUSTENITIC STEELS (1.4539 – 1.4529 –
1.4980) :
o Very
high stress corrosion resistance
HEAT RESISTING STEELS (1.4841 – 1.4845) :
o Austenitic
steel with a good oxidation resistance
PRECIPITATION HARDENING STEELS (1.4542 – 1.4545
– 1.4568) :
o Very
high mechanical properties
o Good
corrosion resistance
Pumps with a wide range of
requirements
Irrigation
Pumps
o
Use – Pump water from ground wells
o
Requirements – Corrosion resistance in water
o
Reason to use BUMAX – Corrosion resistance 3x longer and strength
Centrifugal
Pumps
o
Use – Pump for low viscosity materials (water, oil, etc)
o
Requirements – Corrosion resistance in wastewater, Chemicals ect
o
Reason to use BUMAX – Corrosion resistance and lower cost than special
grades
Progressing
Cavity Pumps
o
Use – Pump for very viscous materials
o
Requirements – corrosion resistance in process industries
o
Reason to use BUMAX – Corrosion resistance and lower cost than special
grades
Butterfly Valves
o
Use – Large flow at low pressure
o
Requirements – Corrosion resistance in process industries
o
Reason to use BUMAX – Corrosion resistance and lower cost than special
grades
Ball Valves
o
Use - Gases or liquids with suspended solids
o
Requirements – Corrosion resistance in process industries
o
Reason to use BUMAX – Corrosion resistance and lower cost than special
grades
Solenoid Valves
o
Use – Liquid, gases, oil
o
Requirements – Corrosion resistance
o
Reason to use BUMAX – Corrosion resistance and lower cost than special
grades
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