Miller Electric TS, IH manual Example Stress Relief Profile, Step to 600 F, Ramp rate, Deg/ hr

Step to 600° F

as fast as possible*

Ramp to 1350° F

@ 600° /hr

Dwell @ 1350° F for 1/2 hour

Ramp to 600° F

@ 600° /hr

Free fall to ambient

SEG.n

1

tYPE StEP

(step)

tGt 600

(deg)

SEG.n

2

tYPE rmP.r

(ramp rate)

tGt 1350

(deg)

rAtE 600

(deg/ hr)

SEG.n

3

tYPE dwEl

(soak)

dur 0.5

(in hrs)

SEG.n		SEG.n
4		5
tYPE		tYPE
rmP.r		End
(ramp rate)		(end)
tGt		End.t
600		S OP
(deg)	(sets output to 0)
rAtE
600
(deg/hr)

Example Stress Relief Profile

	1400
	1200
	1000
F	800
Degrees
	600
	400
	200
	0
	0	30	60	90	120	150	180	210	240	270

Time (minutes)

.*On small diameter pipe, it may be necessary to reduce the

output of the power source to achieve a “reasonable rate” in Segment 1; thereafter, the program controls the rate of temperature rise and the output power may be increased to full if desired. To reduce output power, turn power source output knob to desired setting.

Figure 6-2. Setting Stress Relief Profile Using Example Parameters

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