Wednesday, June 27, 2012

Overview of Fasteners in Pump and Valve Systems including BUMAX 88 316 fastener


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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