Model	GZG30	GZG40	GZG50	GZG60	GZG70	GZG80	GZG90
Driving motor power(kw)	5.5kw-4 3kw-4	7.5kw-4 4kw-4	11kw-4 5.5kw-4	15kw-4 7.5kw-4	18.5kw-4 11kw-4	22kw-4 15kw-4	30kw-4 18.5kw-4
Pipe range (mm)	￠6-￠25.4	￠12.7-￠38.1	￠16-￠50.8	￠31.8-￠76.2	￠50.8-￠114	￠88.9-￠159	￠127-￠219
Wall thickness (mm)	0.3-1.2	0.8-2.0	1.0-2.5	1.2-3.0	1.5-4.0	1.5-5.0	1.5-6.0
Welding speed (m/min)	0.8-4.0	0.8-3.0	0.5-2.5	0.4-2.0	0.3-1.5	0.3-1.2	0.2-1.0
Tolerance of out diameter	Completely reach to GB/T12271-2000 standard