Forged steel flanges

Forged flange is defined as a plate type device, normally round, that is attached to the end of a pipe, fitting, valve or other object to facilitate the assembly and disassembly of a piping system.

Forged steel flanges made of carbon steel or stainless steel, the materials conform to the JIS, ASTM A182,A105, DIN17100 ST-2 and BS standard. Dimension to be in accordance with JIS ANSI DIN BS standard accordingly.

The flanges are suitable for connection of steel pipes conveying mediums such as steam, oil, air and water. They are widely used in Chemical industry and Shipbuilding . And the flanges are suitable for welding.The flanges mainly include Welding Neck, Blind, Slip-on, Lap-Joint, Socket,Reducing and Plate type.

Size available:1/2"--72"(DN15-DN1800).

We can supply according to the customer's drawings or samples stating the materials used.

Forged flanges are manufactured in all the different materials to match the material of the pipe and fittings to which they are being attached. While some flanges are made of Cast Iron, the vast majority of flanges are forged carbon steel.

Forged steel flanges are made in seven primary ratings:

ANSI B 16.5 Class 150 lb ANSI B 16.5 Class 400 lb ANSI B 16.5 Class 900 lb ANSI B 16.5 Class 2500 lb

ANSI B 16.5 Class 300 lb ANSI B 16.5 Class 600 lb ANSI B 16.5 Class 1500 lb

Forged flange

Forged flange is defined as a plate type device, normally round, that is attached to the end of a pipe, fitting, valve or other object to facilitate the assembly and disassembly of a piping system.

Forged steel flanges made of carbon steel or stainless steel, the materials conform to the JIS, ASTM A182,A105, DIN17100 ST-2 and BS standard. Dimension to be in accordance with JIS ANSI DIN BS standard accordingly.

The flanges are suitable for connection of steel pipes conveying mediums such as steam, oil, air and water. They are widely used in Chemical industry and Shipbuilding . And the flanges are suitable for welding.The flanges mainly include Welding Neck, Blind, Slip-on, Lap-Joint, Socket,Reducing and Plate type.

Size available:1/2"--72"(DN15-DN1800).

We can supply according to the customer's drawings or samples stating the materials used.

Forged flanges are manufactured in all the different materials to match the material of the pipe and fittings to which they are being attached. While some flanges are made of Cast Iron, the vast majority of flanges are forged carbon steel.

Forged steel flanges are made in seven primary ratings:

ANSI B 16.5 Class 150 lb ANSI B 16.5 Class 400 lb ANSI B 16.5 Class 900 lb ANSI B 16.5 Class 2500 lb

ANSI B 16.5 Class 300 lb ANSI B 16.5 Class 600 lb ANSI B 16.5 Class 1500 lb

NW Long Weld Neck Flanges

 

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. The welding neck flange is the best designed butt-welded flange of those currently available because of its inherent structural value. It is expensive because of the design.

Key Features:

• This is the most common type of high pressure pipe flange.
• They are distinguished from other types of pipe flanges by their long tapered hub and gentle transition of thickness in the region of the butt weld joining them to the pipe.
• The long tapered hub provides an important reinforcement of the weld neck flange proper in terms of strength and resistance to dishing.
• Uses of weld neck flanges:
• The weld neck flange is very resistant to dishing and has a very sturdy connection because it has the pipe along with the tapered hub.
• The flanges are ideal for extreme fluctuations of temperature.
• They are ideal in environments where there may be a lot of bending and handling of the flanges.
• Preferred in an environment with extreme temperature conditions.
• This type of flange is preferred for every severe service condition—resulting from high pressure or from sub-zero or elevated temperature.
• They are used in situations where loading conditions are substantially constant or fluctuate between wide limits.
• This is probably the best welding flange available because of its high, heavy neck.
• Highly recommended wherever a sound welded joint connection is needed.

Tube OD sizes: 3/8 to 2 inches

Materials:
Flange: 304 or 316L stainless steel
O-rings: Viton, Buna, & silicone
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps

Vacuum range

• Elastomer seal: >=1 x 10^-8 Torr - High vacuum
• EVAC metal seal: >=1 x 10^-11 Torr - UHV

Temperature range

• Viton: -20°C to 200°C
• Silicone: -50°C to 230°C
• Buna: -30°C to 110°C
• EVAC metal seal: -270°C to 150°C

Uses of weld neck flanges:

• The weld neck flange is very resistant to dishing and has a very sturdy connection because it has the pipe along with the tapered hub.
• The flanges are ideal for extreme fluctuations of temperature.
• They are ideal in environments where there may be a lot of bending and handling of the flanges.
• Preferred in an environment with extreme temperature conditions.
• This type of flange is preferred for every severe service condition—resulting from high pressure or from sub-zero or elevated temperature.
• They are used in situations where loading conditions are substantially constant or fluctuate between wide limits.
• This is probably the best welding flange available because of its high, heavy neck.
• Highly recommended wherever a sound welded joint connection is needed.

WN Flange

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange.

The welding neck flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value. It is expensive because of the design.

Standards, Dimensions & Weight

• ASME/ANSI B16.5 Class 150 WN
• ASME/ANSI B16.5 Class 300 WN
• ASME/ANSI B16.5 Class 600 WN
• ASME/ANSI B16.5 Class 900 WN
• ASME/ANSI B16.5 Class 1500 WN
• ASME/ANSI B16.5 Class 2500 WN
• ASME B16.47 Series A/MSS SP-44 Class 150 WN
• ASME B16.47 Series A/MSS SP-44 Class 300 WN
• ASME B16.47 Series A/MSS SP-44 Class 600 WN
• ASME B16.47 Series A/MSS SP-44 Class 900 WN
• ASME B16.47 Series B/API 605 Class 75 WN
• ASME B16.47 Series B/API 605 Class 150 WN
• ASME B16.47 Series B/API 605 Class 300 WN
• ASME B16.47 Series B/API 605 Class 600 WN
• ASME B16.47 Series B/API 605 Class 900 WN
• BS 3293 Class 150 WN
• BS 3293 Class 300 WN
• BS 3293 Class 600 WN
• DIN 2631 PN 6
• DIN 2632 PN 10
• DIN 2633 PN 16
• DIN 2634 PN 25
• DIN 2635 PN40

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, C22.8, S355JR
• Stainless steel: A182 F304/F304L/F316/F316L/F321
• Alloy steel: F11, F12

Packing: plywood case and plywood pallet

DIN 2634 PN25

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange.

The welding neck flange is the best designed butt-welded flange of those currently available because of its inherent structural value. It is expensive because of the design.

 

Pipe			Flange				Neck				Raised face		Screws			Weight of a flange (7,85 Kg/dm3)
Rated Diameter	d1		D	b	k	h1	d3	s	r	h2	d4	f	Number	Thread	d2	Kg
	ISO Series 1	DIN Series 2
15	-	20	95	16	65	38	30	2	4	6	45	2	4	M 12	14	0,746
	21,3	-					32
20	-	25	105	18	75	40	38	2,3	4	6	58	2	4	M 12	14	1,06
	26,9	-					40
25	-	30	115	18	85	40	42	2,6	4	6	68	2	4	M 12	14	1,29
	33,7	-					45
32	-	38	140	18	100	42	52	2,6	6	6	78	2	4	M 16	18	1,88
	42,4	-					56
40	-	44,5	150	18	110	45	60	2,6	6	7	88	3	4	M 16	18	2,33
	48,3	-					64
50	-	57	165	20	125	48	72	2,9	6	8	102	3	4	M 16	18	2,82
	60,3	-					75
65	76,1	-	185	22	145	52	90	2,9	6	10	122	3	8	M 16	18	3,74
80	88,9	-	200	24	160	58	105	3,2	8	12	138	3	8	M 16	18	4,75
100	-	108	235	24	190	65	128	3,6	8	12	162	3	8	M 20	22	6,52
	114,3	-					134
125	-	133	270	26	220	68	155	4	8	12	188	3	8	M 24	26	9,07
	139,7	-					162
150	-	159	300	28	250	75	182	4,5	10	12	218	3	8	M 24	26	11,8
	168,3	-					192
(175)	193,7	-	350	28	280	75	218	5,6	10	15	248	3	12	M 24	26	13,4
200	219,1	-	360	30	310	80	244	6,3	10	16	278	3	12	M 24	26	17
250	-	267	425	32	370	88	292	7,1	12	18	335	3	12	M 27	30	24,4
	273	-					298
300	323,9	-	485	34	430	92	352	8	12	18	395	4	16	M 27	30	31,2
350	355,6	-	555	38	490	100	398	8	12	20	450	4	16	M 30	33	47,2
	-	368														44,2
400	406,4	-	620	40	550	110	452	8,8	12	20	505	4	16	M 33	36	61,7
	-	419														57,9
(450)	457	-	670	42	600	110	500	8,8	12	20	550	4	20	M 33	36	71,9
500	508	-	730	44	660	125	558	10	12	20	615	4	20	M 33	36	89,6
600	610	-	845	46	770	125	660	11	12	20	720	5	20	M 36	39	104
700	711	-	960	46	875	125	760	13	20	24	820	5	24	M 39	42	136
800	813	-	1085	50	990	135	865	14	22	24	930	5	24	M 45	48	186
900	914	-	1185	54	1090	145	968	16	24	28	1030	5	28	M 45	48	236
1000	1016	-	1320	58	1210	155	1070	18	24	28	1140	5	28	M 52	56	307