ASTM A350 LF3 Flanges

ASME SA 350 LF3 CL1 Forgings Manufacturer in India

What is ASTM A350 LF3 Flanges & Temperature Range as well pressure class
The ASTM A350 can be defined as a low-alloy steel, and the LF3 grade has a unique chemical composition that consists of Carbon at 0.2% maximum. The material grade also has other elements such as silicon, sulfur, phosphorus, chromium, and nickel in its composition at varying quantities. The ASTM A350 LF3 flange is forged within the temperature range of 1175 to 1205 degrees C. But it is to be noted that they should not be forged below the temperature of 925 degrees C.
The temperature range of ASTM A350 LF3 is above 200 degrees C, when the pressure class is 150, and it is 400 degrees C for higher pressure classes. The low operating temperature is above -29 degrees C.
The ASTM A350 LF3 flanges are available in different pressure classes ranging between class 150 to class 2500. The varied pressure classes enables the flanges to be used in different applications.

ASME SA 350 LF3 CL1 Forging process
The ASTM A350 LF3 flange is forged within the temperature range of 1175 to 1205 degrees C. But it is to be noted that they should not be forged below the temperature of 925 degrees C. Heat treatment is given to these continuously, and after welding as well. The structure is determined by the forging process, which means the structure of the flange will be determined from forgings. They can also be machined easily as and when required, and it can also be done in as-forged structure. Thus, depending on the end use of the flange, it is essential to determine the machining process accordingly.

ASTM A350 LF3 Flanges

Check Price List of LTCS Gr LF3 Weld Neck, Blind, and A 350 LF3 Plate Flange Ex Mumbai

Table of Content

• Spec List of ASTM A350 LF3 Flanges
• Size Range of ASTM A350 Grade LF3 Flange
• A350 LF3 Flanges Weight Chart
• ASTM A350 LF3 Flanges Price List
• A350 Lf3 Chemical Composition
• ASTM A350 Lf3 Mechanical Properties
• ASTM A350 Lf3 Temperature Range
• Thermal Properties of ASTM A350 Lf3 Class 1 Flange
• ASTM A350 Gr LF3 Flange Physical Properties
• Various Types of ASTM A350 LF3 Flanges
• Processing Equipment Strength of A350 Gr LF3 Flange
• Thickness Of A350 LF3 Class 2 Flanges
• ASTM A350 Gr LF3 Flanges Pressure Rating

Spec List of ASTM A350 LF3 Flanges

Size Range	1/2″(15 NB) to 48″ (1200NB)
Pressure Rating Chart ANSI	150 LBS, 300 LBS, 2500 LBS, 900 LBS, 600 LBS, 1500 LBS
JIS	16 K, 5K, 10 K, 20 K, 30 K, 40 K, 63 K
Manufacturer of Connect Type/ Flange Face Type	RF, Small Tongue, RTJ, FF, LJF, Large Tongue & Groove
Coating	Zinc Plated, Anti-rust Paint, Yellow Transparent, Oil Black Paint, Cold and Hot Dip Galvanized
Manufacturer of	GOST, JIS, ANSI, DIN, UNI, BS, AWWA, AS2129, SABS, NFE, EN etc.
DIN Pressure Calculation	25Bar 40Bar 16Bar 6Bar 10Bar / PN64 PN10 PN25 PN16 PN6 PN40
Equipment	Pushing Machine, Press machine, Sand-blasting machine, Bending machine, electric bevelling machine etc
Origin	Japan / West Europe / Indian / USA / Korean
UNI / EN	16Bar 6Bar 40Bar 10Bar 25Bar
Test	X-ray detector, Direct-reading Spectrograph, Magnetic particle detector, Ultrasonic flaw detector, Hydrostatic testing machine
Standards Provided By Manufacturer	ISO70051, MSS S44, API7S-43, API605, B16.48, ANSI/ASME B16.5, B16.47 Series A & B, BS4504, JISB2220, BS1560-3.1, ASME/ANSI B16.5/16.36/16.47A/16.47B, BS 10, EN-1092, DIN, API7S-15, EN1092
Common Types By Manufacturer	Threaded / Screwed / Forged / Plate
Production technique Used By Manufacturer	Heat treated, Forged and machined

Size Range of ASTM A350 Grade LF3 Flange

Nominal Pipe Size NPS (inches)	Class 300
	Diameter of Flange (inches)	No. of Bolts	Diameter of Bolts (inches)	Diameter of Bolt Holes (inches)	Bolt Circle (inches)
1/4	3-3/8	4	1/2	0.62	2-1/4
1/2	3-3/4	4	1/2	0.62	2-5/8
3/4	4-5/8	4	5/8	0.75	3-1/4
1	4-7/8	4	5/8	0.75	3-1/2
1-1/4	5-1/4	4	5/8	0.75	3-7/8
1-1/2	6-1/8	4	3/4	0.88	4-1/2
2	6-1/2	8	5/8	0.75	5
2-1/2	7-1/2	8	3/4	0.88	5-7/8
3	8-1/4	8	3/4	0.88	6-5/8
3-1/2	9	8	3/4	0.88	7-1/4
4	10	8	3/4	0.88	7-7/8
5	11	8	3/4	0.88	9-1/4
6	12-1/2	12	3/4	0.88	10-5/8
8	15	12	7/8	1	13
10	17-1/2	16	1	1.12	15-1/4
12	20-1/2	16	1-1/8	1.25	17-3/4
14	23	20	1-1/8	1.25	20-1/4
16	25-1/2	20	1-1/4	1.38	22-1/2
18	28	24	1-1/4	1.38	24-3/4
20	30-1/2	24	1-1/4	1.38	27
24	36	24	1-1/2	1.62	32

A350 LF3 Flanges Weight Chart

NPS (Nominal Pipe Size)	Loose (Lap Joint)	NPT (Threaded)	SORF (Slip On)	BLRF (Blind)	SWRF (Socket Weld)	WRNR (Weld Neck)
½	1	1	1	2	2	2
1	2	2	2	2	2	3
1¼	3	3	3	3	3	3
¾	2	2	2	2	2	2
1½	3	3	3	4	3	4
2½	8	8	8	7	8	10
2	5	5	5	5	5	6
3	9	9	9	9	9	11.5
4	13	13	13	17	13	16.5
3½	11	12	11	13	11	12
5	15	15	15	20	15	21
8	30	30	30	47	30	42
6	19	19	19	27	19	26
10	43	43	43	70	43	54
24	275	220	220	430	220	268
14	105	90	90	140	90	114
12	64	64	64	123	64	88
16	140	98	106	180	98	140
20	195	165	165	285	165	197
18	160	130	130	220	130	165
22	245	185	185	355	185	225

Supplier of LTCS Flange Material in India and Largest Stockist of DIN 1.5639 flange in India

ASTM A350 LF3 Flanges Price List

ASTM A350 LF3 Flanges Price Per Piece in India	ASTM A350 Grade LF3 Flange Price in INR	ASTM A350 Lf3 Class 1 Flange Price in UAE Dirham	A350 LF3 Class 2 Flanges Price in USD
WNRF 4 INCH X SCH 120/160 X 150 SA-350 LF3 CLASS 1 Per Kg	811	UAE Dirham 40.03	$10.90
2 inch astm a350 lf3 weld neck flange ASME/ANSI B16.5 Per Kg	186.05	UAE Dirham 9.18	$2.50

A350 Lf3 Chemical Composition

Element	Min	Max
V	-	0.0300
S	-	0.0400
P	-	0.0350
Si	0.2000	0.3500
Ni	3.3000	3.7000
Nb	-	0.0200
Cr	-	0.3000
Mo	-	0.1200
Cu	-	0.4000
Mn	-	0.9000
Cr+Mo	-	0.3200
C	-	0.2000

ASTM A350 Lf3 Mechanical Properties

Yield Rp0.2 (MPa)	Impact KV/Ku (J)	Reduction in cross section on fracture Z (%)	Elongation A (%)	Tensile Rm (MPa)	Brinell hardness (HBW)
991 (≥)	24	33	34	657 (≥)	333

Manufacturer of Low Alloy steel forged Flanges and A350 LF3 Ring Rolled Flanges

ASTM A350 Lf3 Temperature Range

Temperature Range

343°C

Thermal Properties of ASTM A350 Lf3 Class 1 Flange

Property	Value
Melting point	1316 - 1595 °C
Specific heat capacity	456 J/(kg·K)
Thermal conductivity	10 - 50 W/(m·K)

ASTM A350 Gr LF3 Flange Physical Properties

Temperature (°C)	Specific electrical resistivity (Ω mm²/m)	Modulus of elasticity (GPa)	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Density (kg/dm³)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Poisson’s coefficient, ν
14	0.13	-			-	-
384		978	14.3	441	-	-
828		-	44.2		443	34	312

Various Types of ASTM A350 LF3 Flanges

ASTM A350 LF3 Cl.2 Socket Weld Flange

ASTM A350 Gr Lf3 SORF Flanges

ASTM A350 Gr LF3 WNRF Flange

SA350 LF3 BLRF Flanges

ASTM A350 Grade Lf3 Slip On Flange

ASTM A350 Gr LF3 Cl2 Blind Flange

A350 Grade LF3 Class 2 Girth Flanges

A350 LF3 Class 2 SWRF Flanges

ASTM A350 LF3 Cl1 Expander Flanges

ASTM A350 Grade LF3 Long Weld Neck Flange

ASTM A350 Gr LF3 Cl2 Nipoflange

A350 LF3 Class 2 Screwed Flange

A350 Gr LF3 Reducing Flanges

ASTM A350 Lf3 Class 1 Orifice Flanges

ASTM A350 Grade LF3 Class 2 Lapped Joint Flange

ASTM A350 Grade LF3 Weld Neck Flanges

ASTM A350 Grade LF3 Class 2 Tongue & Groove Flange

ASME SA350 LF3 Spectacle Blind Flange

ASTM A350 LF3 Cl2 Ring Joint Flange

ASTM A350 LF3 Class 1 Threaded Flange

ASTM A350 Grade LF3 Flange

ASTM A350 Lf3 Class 1 Flange

ASTM A350 Gr LF3 Flange

A350 Gr LF3 Flange

A350 LF3 Class 2 Flanges

ASTM A350 Grade LF3 Flanges

A350 Grade LF3 Flanges

ASTM A350 LF3 Forgings and Low Temperature Carbon Steel Material supplier with Test Certificate EN 10204/3.1B

Processing Equipment Strength of A350 Gr LF3 Flange

• Floor-type Milling-boring Machine
• Bending Machine
• Turning and Milling
• Portal-type Processing Center
• Welding Machine
• Cutting Machine
• Vertical Lathe
• Deep-Hole Drilling Machine
• Multi-Drilling Machine
• Planer

Thickness Of A350 LF3 Class 2 Flanges

Nom Pipe Size	OD	Sch 10	Sch 20	Sch 30	STD Wall	Sch 40	Sch 60	EXT Hvy	Sch 80	Sch 100	Sch 120	Sch 140	Sch 160	XX Hvy
½	0.84	0.083			0.109	0.109		0.147	0.147				0.188	0.294
¾	1.05	0.083			0.113	0.113		0.154	0.154				0.219	0.308
1	1.315	0.109			0.133	0.133		0.179	0.179				0.25	0.358
1 ¼	1.66	0.109			0.14	0.14		0.191	0.191				0.25	0.382
1 ½	1.9	0.109			0.145	0.145		0.2	0.2				0.281	0.4
2	2.375	0.109			0.154	0.154		0.218	0.218				0.344	0.436
2 ½	2.875	0.12			0.203	0.203		0.276	0.276				0.375	0.552
3	3.5	0.12			0.216	0.216		0.3	0.3				0.438	0.6
3 ½	4	0.12			0.226	0.226		0.318	0.318					0.636
4	4.5	0.12			0.237	0.237		0.337	0.337		0.438		0.531	0.674
5	5.563	0.134			0.258	0.258		0.375	0.375		0.5		0.625	0.75
6	6.625	0.134			0.28	0.28		0.432	0.432		0.562		0.719	0.864
8	8.625	0.148	0.25	0.277	0.322	0.322	0.406	0.5	0.5	0.594	0.719	0.812	0.906	0.875
10	10.75	0.165	0.25	0.307	0.365	0.365	0.5	0.5	0.594	0.719	0.844	1	1.125	1
12	12.75	0.18	0.25	0.33	0.375	0.406	0.562	0.5	0.688	0.844	1	1.125	1.312	1
14	14	0.25	0.312	0.375	0.375	0.438	0.594	0.5	0.75	0.938	1.094	1.25	1.406
16	16	0.25	0.312	0.375	0.375	0.5	0.656	0.5	0.844	1.031	1.219	1.438	1.594
18	18	0.25	0.312	0.438	0.375	0.562	0.75	0.5	0.938	1.156	1.375	1.562	1.781
20	20	0.25	0.375	0.5	0.375	0.594	0.812	0.5	1.031	1.281	1.5	1.75	1.969
22	22	0.25			0.375			0.5
24	24	0.25	0.375	0.562	0.375	0.688	0.969	0.5	1.219	1.531	1.812	2.062	2.344
26	26				0.375			0.5
30	30	0.312	0.5	0.625	0.375			0.5
36	36	0.312	0.5	0.625	0.375	0.75		0.5
40	40				0.375			0.5
42	42				0.375			0.5
48	48				0.375			0.5

ASTM A350 Gr LF3 Flanges Pressure Rating

Temperature °F	Class 150	Class 600	Class 1500	Class 400	Class 900	Class 300	Class 2500
-20 to 100	275	1440	3600	960	2160	720	6000
300	205	1080	2700	720	1620	540	4500
200	230	1200	3000	800	1800	600	5000
400	190	995	2485	660	1490	495	4140
600	140	875	2185	580	1310	435	3640
650	125	860	2150	575	1290	430	3580
500	170	930	2330	620	1395	465	3880
700	110	850	2125	565	1275	425	3540
750	95	830	2075	555	1245	415	3460
850	65	790	1980	530	1190	395	3300
800	80	805	2015	540	1210	405	3360
900	50	780	1945	520	1165	390	3240
950	35	765	1910	510	1145	380	3180
1000	20	640	1605	430	965	320	2675
1100	20	515	1285	345	770	255	2145
1150	20	400	995	265	595	200	1655
1050	20	615	1545	410	925	310	2570
1200	20	310	770	205	465	155	1285
1250	20	225	565	150	340	115	945
1300	20	170	430	115	255	85	715
1400	20	95	240	65	145	50	400
1350	20	125	310	80	185	60	515
1450	15	70	170	45	105	35	285
1500	10	55	135	35	80	25	230