Type DB Manual Tongs

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The type DB manual tongs are developed to make up or break out connections of drill pipes, casings and corresponding joints for oil and gas drilling projects. As an oil drilling tool, our manual drill pipe tong could be outfitted with different latch lug jaws, hinge jaws and handling shoulders to provide various gripping ranges, and its max. torque is 90 or 55kN·m.

Standard for Type DB Manual Tongs
1. API Spec 7K: Specification for Drilling and Well Servicing Equipment
2. SY/T 5035: National Standard for Petroleum and Gas Industry: Elevator Links, Elevators and Tongs

Technical Data of Type DB Manual Tongs (Q31/2-17-90)

Latch lug jaw			Gripping range		Max. torque (kN·m)
No. of latch lug jaw	No. of axle pin hole		inch	mm	Max. torque (kN·m)
1	Latch lug jaw	I	3¹/₂-4¹/₂	89~114	90
		I	4¹/₂-6	114~152
		II	5-7	127~178
		III	6-8¹/₄	152~210
2		I	8-9⁵/₈	203~244
2		II	10⁵/₈-11¹/₄	270~286
3	Hinge jaw	I	11³/₄-12³/₄	298~324	55
3		II	13³/₈-14³/₈	340~365
4		III	16-17	406~432