Built-in Rotary and Vibrator Hose Type:NJG-SZ / NNG-SZ Manufacturer

Built-in Rotary and Vibrator Hose Type:NJG-SZ / NNG-SZ

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The built-in rotary hose is the flexible connection between the drilling machine and the water faucet for vertical movement, as shown in the following picture.
The vibrator hose is a flexible connection between the slurry pump and the vertical pipe with an exceptional vibration absorption.

Production Standard:

API Spec 7K / ISO 6807 / GB/T 24145

API Standard:

7K-0458

Temperature Range:

Ⅱ级， -25 至 100 ℃

Fire Protection Requirements:

The normal hose structure meets SR6A standards and is able to maintain for up to 5 minutes in a 704℃ fire. The outer cover can be equipped with an added fire insulation layer (glass fiber cloth) which meets SR6B standards for fire protection and maintains up to 30 minutes in a 704℃ fire.

Construction:

Composite rubber as the inner sealing tube, mainly composed of nitrile rubber with an excellent oil, seawater, and thermal resistance.
Protective layer made of a high strength fabric cloth
Skeleton material made of a high strength helix steel wire
Composite rubber cover layer, made of a chloroprene rubber for an outstanding fire protection, oil, abrasion, ozone, and aging resistance.

Optional electric heating tracing feature
Optional stainless-steel armored cover, stainless steel wire, and polyethylene helix cover according to specific requirements
Flexibility Level: FSL2
Maximum Length: 70m
Production Length Tolerance: 6.4m or under ± 64 mm, above 6.4m ± 1％
The minimum bending radius is measured according to the hose central line

NJG-SZ / NNG-SZ Technical Parameters:

Code No.	API Level	I.D. (inch) (mm)		O.D. (inch) (mm)		Working Pressure (bar) (psi)		Test Pressure (bar) (psi)		Flame Shield	Safety Factor	FSL	MBR (storage) (m)	MBR (operation) (m)	Weight (Kg/m)	Max. Length (m)
NJG-SZ-51×34.5	D	2	51	3.58	91	345	5,000	517	7,500	No	2.5	FSL2	0.8	0.9	11.24	70
NNG-SZ-51×34.5	D	2	51	4.17	106	345	5,000	517	7,500	Yes	2.5	FSL2	0.8	0.9	15	70
NJG-SZ-64×34.5	D	2.5	64	4.06	103	345	5,000	517	7,500	No	2.5	FSL2	0.8	0.9	13	70
NNG-SZ-64×34.5	D	2.5	64	4.65	118	345	5,000	517	7,500	Yes	2.5	FSL2	0.8	0.9	16	70
NJG-SZ-76×34.5	D	3	76	4.72	120	345	5,000	517	7,500	No	2.5	FSL2	1.1	1.2	18	70
NNG-SZ-76×34.5	D	3	76	5.28	134	345	5,000	517	7,500	Yes	2.5	FSL2	1.1	1.2	20	70
NJG-SZ-89×34.5	D	3.5	89	5.28	134	345	5,000	517	7,500	No	2.5	FSL2	1.2	1.3	21	70
NNG-SZ-89×34.5	D	3.5	89	5.75	146	345	5,000	517	7,500	Yes	2.5	FSL2	1.2	1.3	25	70
NJG-SZ-102×34.5	D	4	102	6.3	160	345	5,000	517	7,500	No	2.5	FSL2	1.2	1.4	35	70
NNG-SZ-102×34.5	D	4	102	6.8	173	345	5,000	517	7,500	Yes	2.5	FSL2	1.2	1.4	38	70
NJG-SZ-127×34.5	D	5	127	7.52	191	345	5,000	517	7,500	No	2.5	FSL2	1.4	1.5	51	70
NNG-SZ-127×34.5	D	5	127	8.07	205	345	5,000	517	7,500	Yes	2.5	FSL2	1.4	1.5	56	70
NJG-SZ-152×34.5	D	6	152	8.82	224	345	5,000	517	7,500	No	2.5	FSL2	1.6	1.8	57	70
NNG-SZ-51×51.7	E	2	51	4.06	103	517	7,500	776	11,250	No	2.5	FSL2	1.1	1.2	19	70
NJG-SZ-64×51.7	E	2.5	64	4.88	124	517	7,500	776	11,250	No	2.5	FSL2	1.1	1.2	28	70
NNG-SZ-64×51.7	E	2.5	64	5.35	136	517	7,500	776	11,250	Yes	2.5	FSL2	1.1	1.2	31	70
NJG-SZ-76×51.7	E	3	76	5.43	138	517	7,500	776	11,250	No	2.5	FSL2	1.2	1.3	31	70
NNG-SZ-76×51.7	E	3	76	5.98	152	517	7,500	776	11,250	Yes	2.5	FSL2	1.2	1.3	35	70
NJG-SZ-89×51.7	E	3.5	89	5.94	151	517	7,500	776	11,250	No	2.5	FSL2	1.3	1.4	38	70
NNG-SZ-89×51.7	E	3.5	89	6.57	167	517	7,500	776	11,250	Yes	2.5	FSL2	1.3	1.4	42	70
NJG-SZ-102×51.7	E	4	102	6.61	168	517	7,500	776	11,250	No	2.5	FSL2	1.4	1.5	44	70
NNG-SZ-102×51.7	E	4	102	7.17	182	517	7,500	776	11,250	Yes	2.5	FSL2	1.4	1.5	50	70
NJG-SZ-127×51.7	E	5	127	8.03	204	517	7,500	776	11,250	No	2.5	FSL2	1.5	1.6	64	70
NNG-SZ-127×51.7	E	5	127	8.58	218	517	7,500	776	11,250	Yes	2.5	FSL2	1.5	1.6	69	70
NJG-SZ-152×51.7	E	6	152	9.76	248	517	7,500	776	11,250	No	2.5	FSL2	1.6	1.8	92	70