ANSI B16.5 1500LB Stainless Steel 304/316L Flange WN Welded Neck High-pressure Forged Flange Plate

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ANSI B16.5 1500LB Stainless Steel 304/316L Flange WN Welded Neck High-pressure Forged Flange Plate

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ANSI B16.5 1500LB Stainless Steel 304/316L Flange WN Welded Neck High-pressure Forged Flange Plate

Custom Standards: ASME, EN, ISO, JIS, or proprietary specs
Material Flexibility: From corrosion-resistant stainless steel (304，316L) to exotic alloys (Inconel, Hastelloy)
Precision Dimensions: Our advanced CNC systems handle diameters from DN 15 to DN 4000 with micron-level accuracy.

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Model:
WN Flange
Brand:
SDFL

Product Description

High-Quality Forged Stainless Steel Flanges & Pipe Fittings
WE PRODUCE FORGED FLANGES -- Your Reliable Industrial Pipeline Partner

ANSI WN 1500LB

Nominal Size		Outer Diameter	Inner Diameter	Flange Ring Height	Hub Diameter at Base	Weld End OD	Flange wall thickness	Sealing Face Diameter	Sealing Face Height	Flange Overall Height	Central circle diameter	Number of Bolt Holes	Bolt Hole Diameter
DN	NPS	A	B	C	F	E		G		D	J		I
15	1/2	120.6	15.7	22.3	38.1	21.3	5.6	35	6.4	60.45	82.6	4	22.3
20	3/4	130	20.8	25.4	44	26.7	5.9	42.9	6.4	69.85	88.9	4	22.3
25	1	149.3	26.7	28.4	52.3	33.5	6.8	50.8	6.4	73.15	101.6	4	25.4
32	1-1/4	158.7	35.1	28.4	63.5	42.2	7.1	63.5	6.4	73.15	111.3	4	25.4
40	1-1/2	177.8	40.9	31.7	69.85	48.3	7.4	73.15	6.4	82.5	124	4	28.4
50	2	215.9	52.6	38.1	104.6	60.45	7.9	91.9	6.4	101.6	165.1	8	25.4
65	2-1/2	244.3	62.7	41.1	123.9	73.15	10.5	104.6	6.4	104.6	190.5	8	28.4
80	3	266.7	78	47.7	133.3	88.9	10.9	127	6.4	177.3	203.2	8	31.7
100	4	311.1	102.4	53.8	162	114.3	11.9	157	6.4	123.9	241.3	8	35
125	5	374.6	128.3	73.15	196.8	141.2	12.9	185.7	6.4	155.4	292.1	8	41.1
150	6	393.7	154.2	82.5	228.6	168.4	14.2	215.9	6.4	171.4	317.5	12	38.1
200	8	482.6	202.7	91.9	292.1	219.2	16.5	269.7	6.4	212.8	393.7	12	44.4
250	10	584.2	254.5	107.9	368.3	273	18.5	323.8	6.4	254	482.6	12	50.8
300	12	673.1	304.8	123.9	450.8	323.8	19	381	6.4	282.4	571.5	16	53.8
350	14	749.3	336.6	133.3	495.3	355.6	19	412.7	6.4	298.4	635	16	60.5
400	16	825.5	387.4	146	552.4	406.4	19	469.9	6.4	311.1	704.8	16	66.6
450	18	914.4	438.2	162	569.9	457.2	19	533.4	6.4	327.1	774.7	16	73.2
500	20	984.2	489	177.8	641.3	508	19	584.2	6.4	355.6	831.8	16	79.3
600	24	1168.4	590.6	203.2	762	609.6	19	692.1	6.4	406.4	990.6	16	91.9

Structural Design Features

(1) Extended and Thickened Neck Structure
Neck Length: 30% - 50% longer than Class 600 LB WN flange, significantly reducing the stress concentration factor (≤1.2).

Wall Thickness Enhancement: The neck thickness is increased according to ASME B16.5 standard. The neck thickness of DN100 flange can reach 45mm (only 28mm for 600 LB).

Transition Arc: A large - radius arc transition (R≥20mm) is adopted at the connection between the neck and the flange plate to avoid stress mutation.

(2) High - Precision Sealing Surface
Ring - Joint Face (RTJ) Standard Configuration:

An octagonal groove is used, matching R - type or RX - type metal ring gaskets.

The surface roughness of the sealing surface Ra≤1.6μm (mirror - level machining).

Raised Face (RF) Optional: Only used for non - critical liquid media, and needs to be matched with high - pressure spiral - wound gaskets (such as 316L + flexible graphite).