Slip-on flange

The Slip-on flange has a low hub because the pipe slips into the flange prior to welding. It is welded both inside and out to provide suffcient strength and prevent leakage.Slip-on flanges are all bored slightly larger than the O.D. of the pipe. They are preferred over welding neck flanges bu many users due to their lower intial cost, but final intallation cost is probably not much less than that of the welding neck flange because of the additional welding involved.

Advantages of slip on flanges:
Low cost installation
Less time needed to spent on ensuring the accuracy of the cut pipe
They are somewhat easier to align
The slip-on flanges have low hub because the pipe slips into the flange before welding
The flange is welded both inside and outside to provide sufficient strength
They prevent leakage

Standards, Dimensions & Weight

• ASME/ANSI B16.5 Class 150 SO
• ASME/ANSI B16.5 Class 300 SO
• ASME/ANSI B16.5 Class 600 SO
• ASME/ANSI B16.5 Class 900 SO
• BS 3293 Class 150 SO
• BS 3293 Class 300 SO
• BS 3293 Class 600 SO
• DIN 86029 PN 10

Specifications:

Size: 1/2” to 60”, DN 12mm to DN 1500mm
Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250

Facing: RF / RTJ

Material:

• Cabon steel: A105, A350 LF2
• Stainless steel: A182 F304/F304L/F316/F316L/F321
• Alloy steel: F11, F12

Packing: plywood case and plywood pallet

Flange Types

A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.

• Materials for Flanges, Measure the size of a flange



Packing the pipe flange

• Pipe Flanges Raw Material Specifications
• Applications of flanges
• Flange Face Surface Finish
• Pressure Classes of Flanges
• Flanges Manufacturing Process
• Flange materials acc. to ASTM
• Stainless flange, Forged flange

Below are our available industrial pipe flanges that will meet your project needs. We will help you put together your entire project and ship it to your closest port.

We ship globally! Contact us to speak with one of our experienced staff, who can help you with your project needs.

Blind Flanges>> The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes.

Figure-8 Blanks >> A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar.

Lap Joint Flanges >> The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face.

Orifice Flanges >> Orifice flanges are used instead of the standard pipe flanges when orifice plate or flow nozzle is used.

Reducing Flanges >> Reducing flanges are used in pipe-to-pipe connections. Reducing flanges are a little easier to bolt up than non-reducing flanges.

RTJ Flanges >> Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures.

Socket Welding Flanges >> The socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension.

Slip-On Flanges >> The Slip-on flange has a low hub because the pipe slips into the flange prior to welding.

Threaded Flanges >> Threaded (Screwed) flange is similar to the Slip-On flange, but the bore is threaded.

Welding Neck Flanges >> The Welding neck flanges is normally referred to as the high hub flange.

Flanges process

Pipe flanges are manufactured in all the different materials like stainless steel, cast iron, aluminium, brass, bronze, plastic etc. but the most used material is forged carbon steel and have machined surfaces. In addition, flanges, like fittings and pipes, for specific purposes sometimes internally equipped with layers of materials of a completely different quality as the flanges themselves, which are "lined flanges".  The material of a flange, is basically set during the choice of the pipe, in most cases, a flange is of the same material as the pipe. All flanges, discussed on this website fall under the ASME en ASTM standards, unless otherwise indicated. ASME B16.5 describes dimensions, dimensional tolerances etc. and ASTM the different material qualities.

Size: 1/2" NB To 24" NB.
Class: 150#, 300#, 600#, 900#, 1500# & 2500#.

In addition, we also can produce the DIN flange, and the forgings according to the customers drawings, for example, rings and shafts.

Delivery requirment:

Marking: SunnySteel, material grade, standard, specification, heat no.

Surface Treatment: Bright annealed, polished outside and inside surface.

Package: Each pipe in a PVC bag and caps on both ends then bundled in wood case, (option: Bundle with knitted plastic bag/stee crate. )

Inspection: Third party inspection, or by clints

DIN 86029 / 86030

Pipe flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. The Slip-on flange has a low hub because the pipe slips into the flange prior to welding.

It is welded both inside and out to provide sufficient strength and prevent leakage.Slip-on flanges are all bored slightly larger than the O.D. of the pipe.

DIN 8029 PN10
DN	D1	D	D5	B	K	H	D3	R	D4	F	No. of holes	D2	KG
10	17.2	90	17.7	14	60	20	30	4	40	2	4	14	0.56
15	21.3	95	22.0	14	65	20	35	4	45	2	4	14	0.62
20	26.9	105	27.6	16	75	24	45	4	58	2	4	14	0.91
25	33.7	115	34.4	16	85	24	52	5	68	2	4	14	1.09
32	42.4	140	43.1	16	100	26	60	5	78	2	4	18	1.58
40	48.3	150	49.0	16	110	26	70	5	88	3	4	18	1.76
50	60.3	165	61.1	18	125	28	85	5	102	3	4	18	2.39
65	76.1	185	77.1	18	145	32	105	5	122	3	4	18	3.10
80	88.9	200	90.3	20	160	34	118	5	138	3	8	18	3.77
100	114.3	220	115.9	20	180	38	140	5	158	3	8	18	4.29
125	139.7	250	141.6	22	210	40	168	5	188	3	8	18	5.86
150	168.3	285	170.5	22	240	44	196	5	212	3	8	22	7.22
175	193.7	315	196.1	24	270	44	224	6	242	3	8	22	9.18
200	219.4	340	222.0	24	295	44	247	6	268	3	8	22	9.95
250	273.0	395	276.0	26	350	46	300	6	320	3	12	22	12.69
300	323.9	445	327.0	26	400	46	352	6	370	4	12	22	14.40
350	355.6	505	359.0	26	460	53	398	10	430	4	16	22	22.36
400	406.4	565	410.0	26	515	57	448	10	482	4	16	26	26.85
450	457.0	615	461.0	28	565	62	502	10	532	4	20	26	32.53
500	508.0	670	512.0	28	620	67	552	10	585	4	20	26	37.84
600	610.0	780	614.0	28	725	75	658	10	685	5	20	30	49.32
700	711.0	895	716.0	30	840	77	760	10	800	5	24	30	63.86
800	813.0	1015	818.0	32	950	84	864	10	905	5	24	33	85.19
900	914.0	1115	920.0	34	1050	88	969	10	1005	5	28	33	101.36
1000	1016.0	1230	1022.0	34	1160	92	1071	10	1110	5	28	36	119.72

BS 3293 Class 600 SO

Pipe flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.

The Slip-on flange has a low hub because the pipe slips into the flange prior to welding. It is welded both inside and out to provide sufficient strength and prevent leakage.Slip-on flanges are all bored slightly larger than the O.D. of the pipe.

Nominal pipe size	Outside diameter of flange, O	Outside diameter, R	Thickness of flange min., C		Outside diameter of large end of hub, X	Outside diameter of small end of hub, A	Length through hub, Y	Fillet radius	Flange bore, B	Diameter of bolt circle, D	Diameter of bolt holes	Number of bolt holes	Approxi-mate Weight kgs
26	1016.00	749.30	107.95	6.35	747.71	706.44	222.25	14.29	666.75	914.40	50.80	28	407.19
28	1073.15	800.10	111.13	6.35	803.28	760.41	234.95	15.88	717.55	965.20	53.98	28	459.23
30	1130.30	857.25	114.30	6.35	862.01	814.39	247.65	17.46	768.35	1022.35	53.98	28	525.11
32	1193.80	914.40	117.48	6.35	917.58	868.36	260.35	17.46	819.15	1079.50	60.33	28	590.65
34	1244.60	965.20	120.65	6.35	973.14	922.34	269.88	19.05	869.95	1130.30	60.33	28	650.91
36	1314.45	1022.35	123.83	6.35	1031.88	976.31	282.58	19.05	920.75	1193.80	66.68	28	742.09

Note: 7 mm raised face regularly furnished on Classes 150 and 300 unless otherwise ordered.