+91-9619103479
or
vishal@solitaire-overseas.com
ASTM A350 LF2 Flanges Manufacturer & Supplier in India
ASTM A350 LF2 Flanges Manufacturer and Supplier in India
ASTM A350 LF2 Flanges are forged low temperature carbon steel flanges in accordance to ASTM A350/A350M Grade LF2 specification. This grade can provide consistent impact toughness as low as -46°C (-50°F), which helps eliminate the chance of brittle fracture in sub-zero piping systems. LF2 is the most frequently specified grade in the A350 low temperature family, which is applicable to weld neck, slip on, blind, threaded, socket weld and lap joint configurations up to 2500# class. Solitaire Overseas is a prominent manufacturer and supplier of ASTM A350 LF2 flanges in India who provide material documentation and supply ASTM A350 flanges to oil and gas, petrochemical, LNG and offshore projects throughout the world.
Technical Data
Specifications of ASTM A350 LF2 Flanges
| Parameter | Details / Specification |
|---|---|
|
Material Specification |
ASTM A350 Grade LF2 / ASME SA350 Grade LF2 (Class 1 & Class 2) |
|
UNS Designation |
UNS K03011 |
|
Size Range |
½″ to 60″ (NPS) / 15 NB to 1500 NB |
|
Dimensional Standards |
ASME B16.5 (½″ to 24″), ASME B16.47 Series A & B (26″ to 60″), MSS SP-44, API 6A |
|
Pressure Class Ratings |
Class 150#, 300#, 400#, 600#, 900#, 1500#, 2500# |
|
Flange Face Types |
Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male & Female (M&F), Tongue & Groove (T&G) |
|
Flange Types |
Weld Neck (WN), Slip-On (SO), Blind (BL), Threaded/Screwed, Socket Weld (SW), Lap Joint (LJ), Spectacle Blind |
ASTM A350 LF2 Flanges Chemical Compositions
| Grade | Carbon (C%) | Manganese (Mn%) | Silicon (Si%) | Sulfur (S%) | Phosphorus (P%) | Chromium (Cr%) | Nickel (Ni%) |
|---|---|---|---|---|---|---|---|
|
LF1 |
0.30 max |
0.60 – 1.35 |
0.15 – 0.30 |
0.040 max |
0.035 max |
0.30 max |
0.40 max |
|
LF2 |
0.30 max |
0.60 – 1.35 |
0.15 – 0.30 |
0.040 max |
0.035 max |
0.30 max |
0.40 max |
|
LF3 |
0.20 max |
0.90 max |
0.20 – 0.35 |
0.040 max |
0.035 max |
0.30 max |
3.30 – 3.70 |
Mechanical Properties of ASTM A350 LF2 Flanges
| Property | Tensile Strength Min | Yield Strength Min | Elongation Min (2″) | Reduction of Area Min | Hardness Max | Charpy V-Notch (-50ºF) Set of 3 Specimen* | Charpy V-Notch (-50ºF) One Specimen |
|---|---|---|---|---|---|---|---|
|
Imperial / Metric |
70,000 psi (485 MPa) |
36,000 psi (250 MPa) |
22% |
30% |
197 BHN |
15 ft-lbf (20 J) |
12 ft-lbf (16 J) |
Pressure-Temperature Ratings Chart of ASTM A350 LF2 Flanges
| Temperature (°C) | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|---|
|
-29 to 38 |
19.6 |
51.1 |
68.1 |
102.1 |
153.2 |
255.3 |
425.5 |
|
50 |
19.2 |
50.1 |
66.8 |
100.2 |
150.4 |
250.6 |
417.7 |
|
100 |
17.7 |
46.6 |
62.1 |
93.2 |
139.8 |
233.0 |
388.3 |
|
150 |
15.8 |
45.1 |
60.1 |
90.2 |
135.2 |
225.4 |
375.6 |
|
200 |
13.8 |
43.8 |
58.4 |
87.6 |
131.4 |
219.0 |
365.0 |
|
250 |
12.1 |
41.9 |
55.9 |
83.9 |
125.8 |
209.7 |
349.5 |
|
300 |
10.2 |
39.8 |
53.1 |
79.6 |
119.5 |
199.1 |
331.8 |
|
325 |
9.3 |
38.7 |
51.6 |
77.4 |
116.1 |
193.6 |
322.6 |
|
350 |
8.4 |
37.6 |
50.1 |
75.1 |
112.7 |
187.8 |
313.0 |
|
375 |
7.4 |
36.4 |
48.5 |
72.7 |
109.1 |
181.8 |
303.1 |
|
400 |
6.5 |
34.7 |
46.3 |
69.4 |
104.2 |
173.6 |
289.3 |
|
425 |
5.5 |
28.8 |
38.4 |
57.5 |
86.3 |
143.8 |
239.7 |
|
450 |
4.6 |
23.0 |
30.7 |
46.0 |
69.0 |
115.0 |
191.7 |
|
475 |
3.7 |
17.4 |
23.2 |
34.9 |
52.3 |
87.2 |
145.3 |
|
500 |
2.8 |
11.8 |
15.7 |
23.5 |
35.3 |
58.8 |
97.9 |
|
538 |
1.4 |
5.9 |
7.9 |
11.8 |
17.7 |
29.5 |
49.2 |
Weight Chart of ASTM A350 LF2 Flanges
| Standard | Class | Diameter | Bolt Circle Diameter | Number of Bolts | Bolt Size | Diameter of Bolt Hole |
|---|---|---|---|---|---|---|
|
AS4087 |
PN14 |
95 |
67 |
4 |
M12 |
14 |
|
AS 2129 Flange |
Table C |
95 |
67 |
4 |
13 |
14 |
|
Table D |
95 |
67 |
4 |
13 |
14 |
|
|
Table E |
95 |
67 |
4 |
13 |
14 |
|
|
Table F |
95 |
67 |
4 |
13 |
14 |
|
|
Table H |
114 |
83 |
4 |
16 |
17 |
|
|
Table J |
114 |
83 |
4 |
16 |
17 |
|
|
ASTM B16.5 |
ASTM 150 |
89 |
60 |
4 |
13 |
16 |
|
ASTM 300 |
95 |
67 |
4 |
13 |
16 |
|
|
ASTM 600 |
95 |
67 |
4 |
13 |
16 |
|
|
ASTM 900 |
121 |
83 |
4 |
19 |
22 |
|
|
ASTM 1500 |
121 |
83 |
4 |
19 |
22 |
|
|
ISO 7005 (DIN) Flange |
PN6 |
80 |
55 |
4 |
M10 |
11 |
|
PN10 |
95 |
65 |
4 |
M12 |
14 |
|
|
PN16 |
95 |
65 |
4 |
M12 |
14 |
|
|
PN20 |
90 |
60.5 |
4 |
M14 |
16 |
|
|
PN25 |
95 |
65 |
4 |
M12 |
14 |
|
|
PN40 |
95 |
65 |
4 |
M12 |
14 |
Applications and Industrial Uses of ASTM A350 LF2 Flanges
- Oil & Gas Pipelines
- Petrochemical Plants
- Refineries
- LNG and Natural Gas Facilities
- Power Generation Plants
- Chemical Processing Plants
- Offshore Oil & Gas Platforms
- Low-Temperature Process Piping Systems
Frequently Asked Questions
ASTM A350 LF2 Flanges are forged carbon steel flanges designed for pressure-containing piping systems requiring low-temperature impact toughness.
ASTM A350 LF2 is specifically designed and impact tested for low-temperature service, while ASTM A105 is commonly used for general pressure-temperature applications.
Yes, ASTM A350 LF2 Flanges are suitable for low-temperature service where the specified impact toughness requirements are met.
Yes, ASTM A350 LF2 Flanges can be welded using qualified welding procedures appropriate for the material and service conditions.
Yes, ASTM A350 LF2 Flanges can be used in suitable LNG and low-temperature piping systems when their temperature, pressure, and impact-testing requirements are satisfied.