slip-on flanges

Slip-on flanges are flanges with raised seal faces, which are slid and welded directly on the end of the pipe. Yanhao Flange Factory is an outstanding manufacturer specializing in providing a comprehensive range of Slip On Flanges for various industries from China. Choose from our selection of Slip-on Flanges, including a wide range of industry-standard dimensions and specifications. Excellent physical performance, good welding, and sealing property guarantee us to be your best slid on flange supplier.

class 150
class 300
class 400
class 600
class 900
class 1500

ANSI B16.5 Class 150 Slip-On Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/16″ raised face unless otherwise specified.For more alternate flange facings, please click here!

Nominal Pipe Size	Outside Diameter (O)	Bolt Circle (W)	Raised Face Diameter (R)	Number of Holes	Diameter of Holes	Bore (B)	Hub Diameter (X)	Thickness (T)	Length Thru Hub (Y)	Approximate Weight (lbs)
1/2	3.50	2.38	1.38	4	0.62	0.88	1.19	0.38	0.56	1
3/4	3.88	2.75	1.69	4	0.62	1.09	1.50	0.44	0.56	2
1	4.25	3.12	2.00	4	0.62	1.36	1.94	0.50	0.62	2
1 1/4	4.62	3.50	2.50	4	0.62	1.70	2.31	0.56	0.75	3
1 1/2	5.00	3.88	2.88	4	0.62	1.95	2.56	0.62	0.81	3
2	6.00	4.75	3.62	4	0.75	2.44	3.06	0.69	0.94	5
2 1/2	7.00	5.50	4.12	4	0.75	2.94	3.56	0.81	1.06	7
3	7.50	6.00	5.00	4	0.75	3.57	4.25	0.88	1.12	8
3 1/2	8.50	7.00	5.50	8	0.75	4.07	4.81	0.88	1.19	11
4	9.00	7.50	6.19	8	0.75	4.57	5.31	0.88	1.25	13
5	10.00	8.50	7.31	8	0.88	5.66	6.44	0.88	1.38	15
6	11.00	9.50	8.50	8	0.88	6.72	7.56	0.94	1.50	19
8	13.50	11.75	10.62	8	0.88	8.72	9.69	1.06	1.69	30
10	16.00	14.25	12.75	12	1.00	10.88	12.00	1.12	1.88	43
12	19.00	17.00	15.00	12	1.00	12.88	14.38	1.19	2.12	64
14	21.00	18.75	16.25	12	1.12	14.14	15.75	1.31	2.19	90
16	23.50	21.25	18.50	16	1.12	16.16	18.00	1.38	2.44	98
18	25.00	22.75	21.00	16	1.25	18.18	19.88	1.50	2.62	130
20	27.50	25.00	23.00	20	1.25	20.20	22.00	1.62	2.81	165
22	29.50	27.25	25.25	20	1.38	22.22	24.00	1.75	3.06	185
24	32.00	29.50	27.25	20	1.38	24.25	26.12	1.81	3.19	220

ANSI B16.5 Class 300 Slip-On Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/16″ raised face unless otherwise specified.For more alternate flange facings, please click here!

Nominal Pipe Size	Outside Diameter (O)	Bolt Circle (W)	Raised Face Diameter (R)	Number of Holes	Diameter of Holes	Bore (B)	Hub Diameter (X)	Thickness (T)	Length Thru Hub (Y)	Approximate Weight (lbs)
1/2	3.75	2.62	1.38	4	0.63	0.88	1.50	0.50	0.81	2
3/4	4.62	3.25	1.69	4	0.75	1.09	1.88	0.56	0.94	3
1	4.88	3.50	2.00	4	0.75	1.36	2.12	0.62	1.00	3
1 1/4	5.25	3.88	2.50	4	0.75	1.70	2.50	0.69	1.00	4
1 1/2	6.12	4.50	2.88	4	0.88	1.95	2.75	0.75	1.13	6
2	6.50	5.00	3.62	8	0.75	2.44	3.31	0.81	1.25	7
2 1/2	7.50	5.88	4.12	8	0.88	2.94	3.94	0.94	1.44	10
3	8.25	6.62	5.00	8	0.88	3.57	4.62	1.06	1.63	13
3 1/2	9.00	7.25	5.50	8	0.88	4.07	5.25	1.12	1.69	17
4	10.00	7.88	6.19	8	0.88	4.57	5.75	1.19	1.82	22
5	11.00	9.25	7.31	8	0.88	5.66	7.00	1.31	1.94	28
6	12.50	10.62	8.50	12	0.88	6.72	8.12	1.38	2.00	39
8	15.00	13.00	10.62	12	1.00	8.72	10.25	1.56	2.38	58
10	17.50	15.25	12.75	16	1.13	10.88	12.62	1.81	2.56	81
12	20.50	17.75	15.00	16	1.25	12.88	14.75	1.94	2.82	115
14	23.00	20.25	16.25	20	1.25	14.14	16.75	2.06	2.94	165
16	25.50	22.50	18.50	20	1.38	16.16	19.00	2.19	3.19	190
18	28.00	24.75	21.00	24	1.38	18.18	21.00	2.31	3.44	250
20	30.50	27.00	23.00	24	1.38	20.20	23.12	2.44	3.69	315
22	33.00	29.25	25.25	24	1.63	22.22	25.25	2.56	3.94	370
24	36.00	32.00	27.25	24	1.63	24.25	27.62	2.69	4.13	475

ANSI B16.5 Class 400 Slip-On Flanges

(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified.For more alternate flange facings, please click here!

Nominal Pipe Size	Outside Diameter (O)	Bolt Circle (W)	Raised Face Diameter (R)	Number of Holes	Diameter of Holes	Bore (B)	Hub Diameter (X)	Thickness (T)	Length Thru Hub (Y)	Approximate Weight (lbs)
1/2	3.75	2.62	1.38	4	0.63	0.88	1.50	0.56	0.88	2
3/4	4.62	3.25	1.69	4	0.75	1.09	1.88	0.62	1.00	3
1	4.88	3.50	2.00	4	0.75	1.36	2.12	0.69	1.06	4
1 1/4	5.25	3.88	2.50	4	0.75	1.70	2.50	0.81	1.12	5
1 1/2	6.12	4.50	2.88	4	0.88	1.95	2.75	0.88	1.25	7
2	6.50	5.00	3.62	8	0.75	2.44	3.31	1.00	1.44	9
2 1/2	7.50	5.88	4.12	8	0.88	2.94	3.94	1.12	1.62	13
3	8.25	6.62	5.00	8	0.88	3.57	4.62	1.25	1.81	16
3 1/2	9.00	7.25	5.50	8	1.00	4.07	5.25	1.38	1.94	21
4	10.00	7.88	6.19	8	1.00	4.57	5.75	1.38	2.00	26
5	11.00	9.25	7.31	8	1.00	5.66	7.00	1.50	2.12	31
6	12.50	10.62	8.50	12	1.00	6.72	8.12	1.62	2.25	44
8	15.00	13.00	10.62	12	1.13	8.72	10.25	1.88	2.69	67
10	17.50	15.25	12.75	16	1.25	10.88	12.62	2.12	2.88	91
12	20.50	17.75	15.00	16	1.38	12.88	14.75	2.25	3.12	130
14	23.00	20.25	16.25	20	1.38	14.14	16.75	2.38	3.31	180
16	25.50	22.50	18.50	20	1.50	16.16	19.00	2.50	3.69	235
18	28.00	24.75	21.00	24	1.50	18.18	21.00	2.62	3.88	285
20	30.50	27.00	23.00	24	1.63	20.20	23.13	2.75	4.00	345
22	33.00	29.25	25.25	24	1.75	22.22	25.25	2.88	4.25	405
24	36.00	32.00	27.25	24	1.88	24.25	27.62	3.00	4.50	510

ANSI B16.5 Class 600 Slip-On Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified.

Nominal Pipe Size	Outside Diameter (O)	Bolt Circle (W)	Raised Face Diameter (R)	Number of Holes	Diameter of Holes	Bore (B)	Hub Diameter (X)	Thickness (T)	Length Thru Hub (Y)	Approximate Weight (lbs)
1/2	3.75	2.62	1.38	4	0.63	0.88	1.50	0.56	0.88	2
3/4	4.62	3.25	1.69	4	0.75	1.09	1.88	0.62	1.00	3
1	4.88	3.50	2.00	4	0.75	1.36	2.12	0.69	1.06	4
1 1/4	5.25	3.88	2.50	4	0.75	1.70	2.50	0.81	1.12	5
1 1/2	6.12	4.50	2.88	4	0.88	1.95	2.75	0.88	1.25	7
2	6.50	5.00	3.62	8	0.75	2.44	3.31	1.00	1.44	9
2 1/2	7.50	5.88	4.12	8	0.88	2.94	3.94	1.12	1.62	13
3	8.25	6.62	5.00	8	0.88	3.57	4.62	1.25	1.81	16
3 1/2	9.00	7.25	5.50	8	1.00	4.07	5.25	1.38	1.94	21
4	10.75	8.50	6.19	8	1.00	4.57	6.00	1.50	2.12	37
5	13.00	10.50	7.31	8	1.13	5.66	7.44	1.75	2.38	63
6	14.00	11.50	8.50	12	1.13	6.72	8.75	1.88	2.62	80
8	16.50	13.75	10.62	12	1.25	8.72	10.75	2.19	3.00	115
10	20.00	17.00	12.75	16	1.38	10.88	13.50	2.50	3.38	170
12	22.00	19.25	15.00	20	1.38	12.88	15.75	2.62	3.62	200
14	23.75	20.75	16.25	20	1.50	14.14	17.00	2.75	3.69	230
16	27.00	23.75	18.50	20	1.63	16.16	19.50	3.00	4.19	330
18	29.25	25.75	21.00	20	1.75	18.18	21.50	3.25	4.62	400
20	32.00	28.50	23.00	24	1.75	20.20	24.00	3.50	5.00	510
22	34.25	30.62	25.25	24	1.88	22.22	26.25	3.75	5.25	590
24	37.00	33.00	27.25	24	2.00	24.25	28.25	4.00	5.50	730

ANSI B16.5 Class 900 Slip-On Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

Nominal Pipe Size	Outside Diameter (O)	Bolt Circle (W)	Raised Face Diameter (R)	Number of Holes	Diameter of Holes	Bore (B)	Hub Diameter (X)	Thickness (T)	Length Thru Hub (Y)	Approximate Weight (lbs)
1/2	4.75	3.25	1.38	4	0.88	0.88	1.50	0.88	1.25	4
3/4	5.12	3.50	1.69	4	0.88	1.09	1.75	1.00	1.38	5
1	5.88	4.00	2.00	4	1.00	1.36	2.06	1.12	1.62	8
1 1/4	6.25	4.38	2.50	4	1.00	1.70	2.50	1.12	1.62	9
1 1/2	7.00	4.88	2.88	4	1.13	1.97	2.75	1.25	1.75	12
2	8.50	6.50	3.62	8	1.00	2.46	4.12	1.50	2.25	25
2 1/2	9.62	7.50	4.12	8	1.13	2.97	4.88	1.62	2.50	36
3	9.50	7.50	5.00	8	1.00	3.57	5.00	1.50	2.12	26
4	11.50	9.25	6.19	8	1.25	4.57	6.25	1.75	2.75	53
5	13.75	11.00	7.31	8	1.38	5.66	7.50	2.00	3.12	83
6	15.00	12.50	8.50	12	1.25	6.72	9.25	2.19	3.38	110
8	18.50	15.50	10.62	12	1.50	8.72	11.75	2.50	4.00	170
10	21.50	18.50	12.75	16	1.50	10.88	14.50	2.75	4.25	245
12	24.00	21.00	15.00	20	1.50	12.88	16.50	3.12	4.62	325
14	25.25	22.00	16.25	20	1.63	14.14	17.75	3.38	5.12	400
16	27.75	24.25	18.50	20	1.75	16.16	20.00	3.50	5.25	425
18	31.00	27.00	21.00	20	2.00	18.18	22.25	4.00	6.00	600
20	33.75	29.50	23.00	20	2.13	20.20	24.50	4.25	6.25	730
24	41.00	35.50	27.25	20	2.63	24.25	29.50	5.50	8.00	1400

ANSI B16.5 Class 1500 Slip-On Flanges

(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

Nominal Pipe Size	Outside Diameter (O)	Bolt Circle (W)	Raised Face Diameter (R)	Number of Holes	Diameter of Holes	Bore (B)	Hub Diameter (X)	Thickness (T)	Length Thru Hub (Y)	Approximate Weight (lbs)
1/2	4.75	3.25	1.38	4	0.88	0.88	1.50	0.88	1.25	4
3/4	5.12	3.50	1.69	4	0.88	1.09	1.75	1.00	1.38	5
1	5.88	4.00	2.00	4	1.00	1.36	2.06	1.12	1.62	8
1 1/4	6.25	4.38	2.50	4	1.00	1.70	2.50	1.12	1.62	9
1 1/2	7.00	4.88	2.88	4	1.13	1.95	2.75	1.25	1.75	12
2	8.50	6.50	3.62	8	1.00	2.44	4.12	1.50	2.25	25
2 1/2	9.62	7.50	4.12	8	1.13	2.94	4.88	1.62	2.50	36

China Top Slip On Flange Manufacturer & Supplier

Slip-on flanges are flanges with raised seal faces, which are slid and welded directly on the end of the pipe. Yanhao Flange Factory is an outstanding manufacturer specializing in providing a comprehensive range of Slip On Flanges for various industries from China. Choose from our selection of Slip-On Flanges, including a wide range of industry-standard dimensions and specifications. Excellent physical performance, good welding, and sealing property guarantee us to be your best slid on flange supplier.

Our steel slip-on flange products are all of excellent quality with competitive prices, professional production equipment, production team, sales, and QC departments.

Our qualified Slip-On flanges have excellent performance leak-proof, can be applied in an extreme environment like corrosive, high temperature, and vibratory, and are very easy to install and disassemble.

We built long-term relationships with our customers and from design to production, transportation, supply our customers a full and comprehensive service and let customers without any concerns.

OEM/ODM service accepted standard or no-standard steel slip-on flanges in various specifications and standard materials can be manufactured according to customers’ requirements.

Top Quality Standard or No-Standard Slip-On Flanges Supply

We offer many references of Slip-on flanges made of stainless steel, carbon steel, and alloy steel. Our steel slip-on flanges are recommended for installations subject to medium pressures. We manufacture Slip On Flanges for over 20 years, do not hesitate to contact us for more information.

What is Slip-On Flange?

Slip-on Flange belongs to one of the flat welded flange series. Slip-on Flange is the same as the flat welding flange, is fixed by two welding fillets, both inside and outside the flange. Slip-on flanges slide over the end of a tube and then weld in place. These flanges work well for low-pressure applications.

The weld-on flange slides over the top of the end of the pipe, then is welded to it. The inside and outside of the flange are both welded, to provide sufficient resistance, without leakage. It may be preferred to the flange for its lower price, the greater tolerance in the length of the tube to be cut, and the greater facility for aligning the assembly. Its resistance to internal pressure and its fatigue resistance is lower than for a flange with welded flange. This is why its use is limited to small diameters for the highest pressures. It is perfect for low-pressure applications.

Slip-On Flange Materials

Carbon Steel Flange: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65 ,F70;

Stainless Steel Flange: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;

Alloy Steel Flange: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ;

Sealing Surface Types For Slip-On Flanges

RF (Raised Face);

FF (Flat Face);

MFM (Male-and-Female Face);

F (Female Face);

M (Male Face);

TG (Tongue and Groove Face);

Among them, the uneven surface (MFM) is a matching use;

click here -> Alternate Flange Facings

Slip-On Flange Standard

ANSI、ASME、JIS、DIN、BS4504、SABS1123、EN1092-1、UNI、AS2129、GOST-12820

Specification of Slip-On Flanges

1/2″~24″

Slip-On Flange Pressure Grade

PN series: PN2.5Mpa~PN40Mpa;

Class series: Class150~Class1500;

Surface Treatment

Anti-rust Oil, Transparent/Yellow/Black Anti-rust Paint, Zinc, Hot dipped Galvanized.

Application

Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects, etc.

If you need other flanges please click here: Flanges

Latest Blog Posts