NORSOK NCF5 Series

• Advantage
  • Space saving
    • Weight saving up to 70%~80% than ANSI flanges
  • Double Independent Seals make it er
    • Positive sealing method
  • Integrated sealing system (both inside and outside)
    • Larger range in design temperature and pressure
• Working Principle
• The RCF compact flange design principle is that the flange face includes two independent seals. The first seal is created by application of seal seating stress at the flange heel. The main seal is the IX seal ring. The seal ring force is provided by the elastic stored energy in the stressed seal ring. Any heel leakage will give internal pressure acting on the seal ring inside intensifying the sealing action.
• Size and Pressure Rating
  • 1/2”~48” in size and Class 150# to 2500# in pressure rating
  • Bigger size and higher pressure rating on request
• Materials
  • ASTM A105, A350 LF2, LF6, A694 F52~F65
  • AISI 4130, AISI 8630
  • A182 F316/316L, F44, F51, F53, F55, F60
  • ASTM B564 N06625
  • Other materials on request
• Gasket
  • RCF IX seal ring, axial forces are exerted on the taper of the metal seal ring and translated into a radial sealing force. Furthermore with increased pre-load, the bevel is closed and face to face contact is achieved at the outer wedge while most of the bolt pre-load is transferred as compressive forces between the flange faces at the heel.

    Weld Neck, Integral, Blinds, Targets and Test Blinds - Pressure Ratings -
    Max Working Pressure	2000 PSI	3000 PSI	5000 PSI
    Test Pressure	3000 PSI	4500 PSI	7500 PSI
    Product Spec Levels	1, 2, 3 and 4	1, 2, 3 and 4	1, 2, 3 and 4
    API Temp Rating	K (-60 ° C) to Y (+345 ° C)	K (-60 ° C) to Y (+345 ° C)	K (-60 ° C) to Y (+345 ° C)
    Integral, Blind, Target Blind and Test Flanges
    Min. Yield	60 000 PSI	60 000 PSI	60 000 PSI
    Min. Tensile	85 000 PSI	85 000 PSI	85 000 PSI
    Material	API 60K	API 60K	API 60K
    Weld Neck Flanges
    Min. Yield	45 000 PSI	45 000 PSI	45 000 PSI
    Min. Tensile	70 000 PSI	70 000 PSI	70 000 PSI
    Material	API 45K	API 45K	API 45K
    Flanges for Wellhead and Christmas Tree Equipment Weld Neck, Integral, Blinds, Targets and Test Blinds - Pressure Ratings -
    Max Working Pressure	10 000 PSI	15 000 PSI	20 000 PSI
    Test Pressure	15 000 PSI	22 500 PSI	30 000 PSI
    Product Spec Levels	1, 2, 3 and 4	1, 2, 3 and 4	1, 2, 3 and 4
    API Temp Rating	K (-60 ° C) to Y (+345 ° C)	K (-60 ° C) to Y (+345 ° C)	K (-60 ° C) to Y (+345 ° C)
    Integral, Blind, Target Blind and Test Flanges
    Min. Yield	60 000 PSI	75 000 PSI	75 000 PSI
    Min. Tensile	85 000 PSI	95 000 PSI	95 000 PSI
    Material	API 60K	API 75K	API 75K
    Weld Neck Flanges
    Min. Yield	60 000 PSI	75 000 PSI	75 000 PSI
    Min. Tensile	85 000 PSI	95 000 PSI	95 000 PSI
    Material	API 60K	API 75K	API 75K

    

    Nominal Size and Bore	Max Bore	Out Side Dia	Tolerance	Max Chamfer
    	B	D	D	C
    	2000 PSI
    26.3/4	26.78	41	± 0.12	0.25
    30	30.03	44.19	± 0.12	0.25
    	3000 PSI
    26.3/4	26.78	43.38	± 0.12	0.25
    30	30.03	46.68	± 0.12	0.25
    	5000 PSI
    13.3/8	13.66	26.5	± 0.12	0.25
    16.3/4	16.78	30.38	± 0.12	0.25
    18.3/4	18.78	35.62	± 0.12	0.25
    21.3/4	21.28	39	± 0.12	0.25
    	10000 PSI
    1.13/16	1.84	7.38	± 0.06	0.12
    2.1/16	2.09	7.88	± 0.06	0.12
    2.9/16	2.59	9.12	± 0.06	0.12
    3.1/16	3.09	10.62	± 0.06	0.12
    4.1/16	4.09	12.44	± 0.06	0.12
    5.1/8	5.16	14.06	± 0.06	0.12
    7.1/16	7.09	18.88	± 0.12	0.25
    9	9.03	21.75	± 0.12	0.25
    11	11.03	25.75	± 0.12	0.25
    13.5/8	13.66	30.25	± 0.12	0.25
    16.3/4	16.78	34.31	± 0.12	0.25
    18.3/4	18.78	40.94	± 0.12	0.25
    21.1/4	21.28	45	± 0.12	0.25
    	15000 PSI
    1.13/16	1.84	8.19	± 0.06	0.12
    2.1/16	2.09	8.75	± 0.06	0.12
    2.9/16	2.59	10	± 0.06	0.12
    3.1/16	3.09	11.31	± 0.06	0.12
    4.1/16	4.09	14.19	± 0.06	0.12
    5.1/8	5.16	16.5	± 0.06	0.12
    7.1/16	7.09	19.88	± 0.12	0.25
    9	9.03	25.5	± 0.12	0.25
    11	11.03	32	± 0.12	0.25
    13.5/8	13.66	34.88	± 0.12	0.25
    18.3/4	18.78	45.75	± 0.12	0.25
    	20000 PSI
    1.13/16	1.84	10.12	± 0.06	0.12
    2.1/16	2.09	11.31	± 0.06	0.12
    2.9/16	2.59	12.81	± 0.06	0.12
    3.1/16	3.09	14.06	± 0.06	0.12
    4.1/16	4.09	17.56	± 0.06	0.12
    7.1/16	7.09	25.81	± 0.12	0.25
    9	9.03	31.69	± 0.12	0.25
    11	11.03	34.75	± 0.12	0.25
    13.5/8	13.66	45.75	± 0.12	0.25
    Nominal Size and Bore	Dia Raised Face	Total THK	Large Dia Hub	Small Dia Hub
    	F	T	A	E
    	2000 PSI
    26.3/4	31.69	4.97	32.91	29.25
    30	35.75	5.28	36.69	32.8
    	3000 PSI
    26.3/4	32.75	6.34	34.25	30.56
    30	36.31	6.58	38.19	34.3
    	5000 PSI
    13.3/8	18	4.44	18.94	16.69
    16.3/4	21.06	5.13	21.88	20.75
    18.3/4	24.69	6.53	26.56	23.56
    21.3/4	27.62	7.12	29.88	26.75
    	10000 PSI
    1.13/16	4.12	1.66	3.5	2.56
    2.1/16	4.38	1.73	3.94	2.94
    2.9/16	5.19	2.02	4.75	3.62
    3.1/16	6	2.3	5.59	4.34
    4.1/16	7.28	2.77	7.19	5.75
    5.1/8	8.69	3.12	8.81	7.19
    7.1/16	11.88	4.06	11.88	10
    9	14.12	4.88	14.75	12.88
    11	16.88	5.56	17.75	15.75
    13.5/8	20.38	6.62	21.75	19.5
    16.3/4	22.69	6.62	25.81	23.69
    18.3/4	27.44	8.78	29.62	26.56
    21.1/4	30.75	9.5	33.38	30
    	15000 PSI
    1.13/16	4.19	1.78	3.84	2.81
    2.1/16	4.5	2	4.38	3.25
    2.9/16	5.25	2.25	5.06	3.94