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Note 1 – The cut pieces are heated in oil fired furnace at 1100 °C and the forging process ends at 910 ° C.

Note 2 – Normalizing is not required for flanges up to class #300 as per code ASTM A105. Above class #300

normalizing is done in induction (electric) heating furnace at 910 °C and then air cooled.

Raw Material receipt

Incoming inspection

(review of MTC and

chemical check testing

as per ASTM A105)

Heating of Cut pieces

Refer note 1

Machining

Drilling

Final inspection

(Dimensional & visual as

per ANSI B16.5) Cutting

Forging

Dimensional & visual

inspection

Heat Treatment

Refer note 2

Stamping

Color & Packing

Final Dispatch

Inspection mechanical

properties (physical

testing as per ASTM

A105

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Process Chart – Carbon Steel Flange