API Gauge

Sharpfine offers American Petroleum Institute – API thread gauges. We are able to provide special conical pipe thread gauges for the petroleum industry,designed, manufactured and inspected according to the structural dimensions of the parts.

API gauge conform:
- API spec 5B
- API Spec 7-2

This kind of API GAUGE is a coarse thread mainly used in drill pipes for blasthole ，mining or rock drilling.

API gauge (Casing Round Thread)

Gauge Code	Outer dia. Ø	Taper
4 1/2 (CSG/LCSG)	114.30	1:16
5 (CSG/LCSG)	127.00	1:16
5 1/2 (CSG/LCSG)	139.70	1:16
6 5/8 (CSG/LCSG)	168.28	1:16
7 (CSG/LCSG)	177.80	1:16
7 5/8 (CSG/LCSG)	193.68	1:16
8 5/8 (CSG/LCSG)	219.08	1:16
9 5/8 (CSG/LCSG)	244.48	1:16
10 3/4 (CSG/LCSG)	273.05	1:16
11 3/4 (CSG/LCSG)	298.45	1:16
13 3/8 (CSG/LCSG)	339.73	1:16
16 (CSG/LCSG)	406.40	1:16

The pitch of API gauges:3.175(8); The form angle of API thread gauge:60°

API gauge (Buttress Casing Thread)

Gauge Code	Outer dia. Ø	Taper
4 1/2 BCSG	114.30	1:16
5 BCSG	127.00	1:16
5 1/2 BCSG	139.70	1:16
6 5/8 BCSG	168.28	1:16
7 BCSG	177.80	1:16
7 5/8 BCSG	193.68	1:16
8 5/8 BCSG	219.08	1:16
9 5/8 BCSG	244.48	1:16
10 3/4 BCSG	273.05	1:16
11 3/4 BCSG	298.45	1:16
13 3/8 BCSG	339.73	1:16
16 BCSG	406.40	1:12

The pitch of API gauges:5.08(5); The form angle of API thread gauge:3°, 10°.

API gauge (Non-upset Tubing Thread)

Gauge Code	Outer dia. Ø	Pitch	Taper
1.050 TBG	26.67	2.54(10)	1:16
1.315 TBG	33.40	2.54(10)	1:16
1.660 TBG	42.16	2.54(10)	1:16
1.900 TBG	48.26	2.54(10)	1:16
2 3/8 TBG	60.33	2.54(10)	1:16
2 7/8 TBG	73.03	2.54(10)	1:16
3 1/2 TBG	88.90	2.54(10)	1:16
4 TBG	101.60	3.175(8)	1:16
4 1/2 TBG	114.30	3.175(8)	1:16

The form angle of API gauges:60°

API gauge (External-upset Tubing Thread)

Gauge Code	Outer dia. Ø	Pitch	Taper
1.050 UPTBG	26.67	2.54(10)	1:16
1.315 UPTBG	33.40	2.54(10)	1:16
1.660 UPTBG	42.16	2.54(10)	1:16
1.900 UPTBG	48.26	2.54(10)	1:16
2 3/8 UPTBG	60.33	3.175(8)	1:16
2 7/8 UPTBG	73.03	3.175(8)	1:16
3 1/2 UPTBG	88.90	3.175(8)	1:16
4 UPTBG	101.60	3.175(8)	1:16
4 1/2 UPTBG	114.30	3.175(8)	1:16

The form angle of API gauges:60°

API gauge (Line Pipe Thread)

Gauge Code	Outer dia. Ø	Pitch	Taper
1/8 LP	3.18	0.941(27)	1:16
1/4 LP	6.35	1.411(18)	1:16
3/8 LP	9.53	1.411(18)	1:16
1/2 LP	12.70	1.814(14)	1:16
3/4 LP	19.05	1.814(14)	1:16
1 LP	25.40	2.209(11 1/2)	1:16
1 1/4 LP	31.75	2.209(11 1/2)	1:16
1 1/2 LP	38.10	2.209(11 1/2)	1:16
2	50.80	2.209(11 1/2)	1:16
2 1/2 LP	63.50	3.175(8)	1:16
3 LP	76.20	3.175(8)	1:16
3 1/2 LP	88.90	3.175(8)	1:16
4 LP	101.60	3.175(8)	1:16
5 LP	127.00	3.175(8)	1:16
6 LP	152.40	3.175(8)	1:16
8 LP	203.20	3.175(8)	1:16
10 LP	254.00	3.175(8)	1:16

The form angle of API gauges:60°

Reference:

API thread gauge

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API Gauge

API gauge (Casing Round Thread)

API gauge (Buttress Casing Thread)

API gauge (Non-upset Tubing Thread)

API gauge (External-upset Tubing Thread)

API gauge (Line Pipe Thread)

Reference:

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