burning - steel tank institute/steel plate fabricators ... · • the corrosion resistance of...
TRANSCRIPT
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Burning
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Welding
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Welding
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Real Time X-Ray
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Pressing
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Flanging
Flanging
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“Tru-Edge” Machined Bevel
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Why Do We Polish Heads? Appearance
Cosmetic Performance
Surface Slip Surface Release Properties
Product Easy Clean Sanitary
Plant Corrosion Pitting Corrosion Crevice Corrosion
Snag Free
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Different Types of Stainless Steel Finishes
•No.0-Hot rolled, annealed, thicker plates
•No.1-Hot rolled, annealed and passivated
•No.2D- Cold rolled, annealed, pickled and passivated
•No.2B-Same as above with additional pass-through highly polished rollers
•No.2BA- Bright annealed (BA or 2R) same as above then Bright annealed under Oxygen- free
atmospheric conditions
•No.3- Coarse abrasive finish applied mechanically
•No.4- Brushed finish
•No.5- Satin finish
•No.6 -Matte finish
•No.7 -Reflective finish
•No.8- Mirror finish
•No.9- Bead blast finish
•No.10- Heat colored finish- wide range of electro-polished and heat colored surfaces
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Polishing
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Polishing
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Ferros Blatter Polisher
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480” DIA x 10 Ga FOR ANHEUSER BUSCH
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Why Do We Solution Anneal Heads?
• During head forming, the austenitic material is plastically deformed, or cold worked
• Due to cold working, the material’s hardness and tensile strength are increased, while its ductility and toughness are reduced.
• The strengthening occurs because of dislocation movements and dislocation generation within the crystal structure.
• Solution annealing allows for recrystallization of the work hardened grains and restores the austenitic material to its original condition.
• This increases the material’s toughness and ductility making it suitable for pressure vessel fabrication
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Heat Treating
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Heat Treating
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Why Do We Pickle Heads?
• The corrosion resistance of stainless steel is a result of the natural formation of a passive chrome rich oxide film.
• During fabrication and forming operations, the passive layer, or film, may become damaged or compromised.
• Pickling is a chemical treatment which removes free iron contaminants and chrome depleted oxides and assists in restoring the chromium rich passive layer.
• Because pickling is an acid treatment only, it will not remove grease or oil. Therefore, an alkaline cleaner is used prior to pickling to remove any dirt, oil, grease, or other contaminants from the steel surface caused by the fabrication and forming process.
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Pickling – 25’ Heated Nitric Acid Tank
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Heat Transfer – Half Pipe
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Heat Transfer – Half Pipe
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Heat Transfer – Dimple Jacket
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Shipping
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Shipping
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Shipping
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ASME FLANGED AND DISHED
IKR MUST BE A MINIMUM 6% OF DIAMETER (OR 3 x THICKNESS IF GREATER)
DISH RADIUS MUST BE EQUAL TO OR LESS THAN DIAMETER
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ASME Flanged & Dished Head
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ELLIPTICAL HEAD
2:1 IKR IS APPROX 15% OF DIA – IDR IS APPROX 80% OF DIA
90/17 IDR IS 90% OF DIA - IKR IS 17% OF DIA (Accepted by Code)
IDD ID / 4
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Elliptical Head
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ASME 80-10
IDR = 80% OF DIAMETER
IKR = 10% OF DIAMETER
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STANDARD FLANGED AND DISHED
IKR = MIN OF 3 x THICKNESS
IDR - NORMALLY 100% OF DIAMETER
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FLANGED ONLY HEAD
IS RECOGNIZED AS A CODE HEAD
IKR CAN BE 3 x THICKNESS INSTEAD OF MIN 6% OF DIAMETER
OAH = THICKNESS + IKR + STRAIGHT FLANGE
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Flanged Only Head
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DISHED ONLY
PREFER TO MAKE WITH “UNTRIMMED” EDGE
CAN PUT A “RADIAL” OR “VERTICAL” EDGE ON HEAD
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Dished Only Head
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ASME HEMISPHERICAL HEAD
IDR = INSIDE DIAMTER / 2
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ASME Hemispherical Head – 13’
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ASME Hemispherical Head – 360” Dia x 5/16” Thk
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CONICAL HEAD
INCLUDED ANGLE NORMALLY IN THE 60 – 160 DEG RANGE
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Conical Head
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ASME TORICONICAL HEAD
CONICAL HEAD WITH A KNUCKLE
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Flued Toriconical Head
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354” x 0.375” Polished Toricone
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20’ x 0.75” Standard F & D Heads
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