Power Plant Instrumentation and Control Handbook

Appendix I

Process and Mechanical Standard Table

Standard Prefixes

TABLE AP1/A

Conversion Tables of Units

Coded prefix p	Meaning of prefixed unit	Multiply by	Coded prefix	Meaning of prefixed unit	Multiply by
da	deka	10	d	deci	10−1
h	hecto	100	c	centi	10−2
k	kilo	1000	m	milli	10−3
M	mega	106	μ	micro	10−6
G	giga	109	n	nano	10−9
T	tera	1012	p	pico	10−12
P	peta	1015	f	femto	10−15
E	exa	1018	a	atto	10−18
Z	zeta	1021	z	zepto	10−21
Y	yotta	1024	y	yocto	10−24

Standard Units

TABLE AP1/B.1

Standard Units for Temperature

Celsius	C	K − 273.15	(F − 32) × 5/9	(R − 491.67) × 5/9
Rankine	R	K × 9/5	F + 459.67	C × 9/5 + 491.67
Fahrenheit	F	R − 459.67	C × 9/5 +32	K × 9/5 − 459.67
Kelvin	K	C + 273.15	R × 5/9	(F + 459.67) × 5/9

TABLE AP1/B.2

Standard Units for ...