ASME SA182 F11 Cl.2 Self Reinforced Nozzle For Pressure Vessel
The ASME SA182 F11 Cl.2 self-reinforcing nozzle represents a high standard configuration for pressure vessel nozzles: it is integrally forged from chromium-molybdenum alloy steel (1.25Cr-0.5Mo) suitable for medium- and high-temperature environments.
It is primarily used in critical and demanding equipment with extremely high safety requirements, such as hydrogenation reactors and high-temperature, high-pressure heat exchangers.
Properties of Material SA182 F11 Cl.2
This material was chosen to match the self-reinforcing design, as it is commonly used in harsh environments:
Medium- and High-Temperature Performance: It exhibits good creep strength and oxidation resistance below approximately 550°C, making it ideal for high-temperature pressure vessels in oil refining, chemical, and power plants.
Weldability: As a low-alloy steel, its weldability is acceptable, but strict preheating and post-weld heat treatment are required to eliminate welding stress, prevent cold cracking, and restore the properties of the heat-affected zone.
Heat Treatment: Normalizing and tempering of "Cl.2" provides a balanced strength, toughness, and microstructure stability.
Chemical Composition
| Element |
Composition, w.t % Grades |
| LF1 |
LF2 |
LF3 |
LF5 |
LF6 |
LF9 |
LF787 |
| Carbon max |
0.30 |
0.30 |
0.20 |
0.30 |
0.22 |
0.20 |
0.07 |
| Manganese |
0.60-1.35 |
0.60-1.35 |
0.90 max |
0.60-1.35 |
1.15-1.50 |
0.40-1.06 |
0.40-0.70 |
| Phosphorus max |
0.035 |
0.035 |
0.035 |
0.035 |
0.025 |
0.035 |
0.025 |
| Sulfur max |
0.040 |
0.040 |
0.040 |
0.040 |
0.025 |
0.040 |
0.025 |
| Silicon(a) |
0.15-0.30 |
0.15-0.30 |
0.20-0.35 |
0.20-0.35 |
0.15-0.30 |
... |
0.40 max |
| Nickel |
0.40 max(b) |
0.40 max(b) |
3.30-3.70 max |
1.00-2.00 max |
0.40 max(b) |
1.60-2.24 |
0.70-1.00 |
| Chromium |
0.30 max(b)(c) |
0.30 max(b)(c) |
0.30 max(c) |
0.30 max(c) |
0.30 max(b)(c) |
0.30 max(c) |
0.60-0.90 |
| Molybdenum |
0.12 max(b)(c) |
0.12 max(b)(c) |
0.12 max(c) |
0.12 max(c) |
0.12 max(b)(c) |
0.12 max(c) |
0.15-0.25 |
| Copper |
0.40 max(b) |
0.40 max(b) |
0.40 max |
0.40 max |
0.40 max(b) |
0.75-1.25 |
1.00-1.30 |
| Niobium(e) |
0.02 max(d) |
0.02 max(d) |
0.02 max |
0.02 max |
0.02 max |
0.02 max |
-0.02 min |
| Vanadium |
0.08 max |
0.08 max |
0.03 max |
0.03 max |
0.04-0.11 |
0.03 max |
0.03 max |
| Nitrogen |
... |
... |
... |
... |
0.01-0.030 |
... |
... |
Mechanical Requirements
Grade
Class |
Tensile
Strength |
Yield
Strength
min |
Elongation
min |
Hardness
max |
| ksi |
MPa |
ksi |
MPa |
% |
HBW |
LF1
CL1 |
60-85 |
415-585 |
30 |
205 |
25 |
197 |
LF2
CL1 |
70-95 |
485-655 |
36 |
250 |
22 |
197 |
LF2
CL2 |
70-95 |
485-655 |
36 |
250 |
22 |
197 |
LF3
CL1 |
70-95 |
485-655 |
37.5 |
260 |
22 |
197 |
LF3
CL2 |
70-95 |
485-655 |
37.5 |
260 |
22 |
197 |
LF5
CL1 |
60-85 |
415-585 |
30 |
205 |
25 |
197 |
LF5
CL2 |
70-95 |
485-655 |
37.5 |
260 |
22 |
197 |
LF6
CL1 |
66-91 |
455-630 |
52 |
360 |
22 |
197 |
LF6
CL2 |
75-100 |
515-690 |
60 |
415 |
20 |
197 |
LF6
CL3 |
75-100 |
515-690 |
60 |
415 |
20 |
197 |
| LF9 |
63-88 |
435-605 |
46 |
315 |
25 |
197 |
LF787
CL2 |
65-85 |
450-585 |
55 |
380 |
20 |
197 |
LF787
CL3 |
75-95 |
515-655 |
65 |
450 |
20 |
197 |
Charpy V-Notch Impact Properties
| Charpy V-Notch Energy Requirements for 10x10 mm Specimens |
Grade
Class |
A |
B |
| ft·lbf |
J |
ft·lbf |
J |
LF1
LF9 |
13 |
18 |
10 |
14 |
LF2
CL1 |
15 |
20 |
12 |
16 |
LF3
CL1 |
15 |
20 |
12 |
16 |
LF5
CL1
CL2 |
15 |
20 |
12 |
16 |
LF787
CL2
CL3 |
15 |
20 |
12 |
16 |
LF6
CL1 |
15 |
20 |
12 |
16 |
LF2
CL2 |
20 |
27 |
15 |
20 |
LF3
CL2 |
20 |
27 |
15 |
20 |
LF6
CL2
CL3 |
20 |
27 |
15 |
20 |
Frequently used ASTM Grades
| Material |
Pipes |
Fittings |
Flanges |
Valves |
Bolts & Nuts |
| Carbon Steel |
A106 Gr A |
A234 Gr WPA |
A105 |
A216 Gr WCB |
A193 Gr B7
A194 Gr 2H |
| A106 Gr B |
A234 Gr WPB |
A105 |
A216 Gr WCB |
| A106 Gr C |
A234 Gr WPC |
A105 |
A216 Gr WCB |
| |
Carbon Steel
Alloy
High-Temp |
A335 Gr P1 |
A234 Gr WP1 |
A182 Gr F1 |
A217 Gr WC1 |
A193 Gr B7
A194 Gr 2H |
| A335 Gr P11 |
A234 Gr WP11 |
A182 Gr F11 |
A217 Gr WC6 |
| A335 Gr P12 |
A234 Gr WP12 |
A182 Gr F12 |
A217 Gr WC6 |
| A335 Gr P22 |
A234 Gr WP22 |
A182 Gr F22 |
A217 Gr WC9 |
| A335 Gr P5 |
A234 Gr WP5 |
A182 Gr F5 |
A217 Gr C5 |
| A335 Gr P9 |
A234 Gr WP9 |
A182 Gr F9 |
A217 Gr C12 |
| |
Carbon Steel
Alloy
Low-Temp |
A333 Gr 6 |
A420 Gr WPL6 |
A350 Gr LF2 |
A352 Gr LCB |
A320 Gr L7
A194 Gr 7 |
| A333 Gr 3 |
A420 Gr WPL3 |
A350 Gr LF3 |
A352 Gr LC3 |
| |
Austenitic
Stainless
Steel |
A312 Gr TP304 |
A403 Gr WP304 |
A182 Gr F304 |
A182 Gr F304 |
A193 Gr B8
A194 Gr 8 |
| A312 Gr TP316 |
A403 Gr WP316 |
A182 Gr F316 |
A182 Gr F316 |
| A312 Gr TP321 |
A403 Gr WP321 |
A182 Gr F321 |
A182 Gr F321 |
| A312 Gr TP347 |
A403 Gr WP347 |
A182 Gr F347 |
A182 Gr F347 |
Application:
Petrochemical and Refining:
Equipment such as hydrogenation reactors, hydrodesulfurization units, high-pressure separators, and high-temperature heat exchangers operate under high temperature, high pressure, and hydrogen-rich environments for extended periods, requiring materials with resistance to hydrogen corrosion and creep.
Energy and Power:
High-pressure boilers, steam headers, and components subjected to high-temperature steam in thermal power plants, as well as in supercritical or ultra-supercritical units.
Chemical Processes:
Critical connection points such as high-pressure synthesis towers and high-temperature reactors in ammonia and methanol synthesis plants.
Other Harsh Operating Conditions: Applications involving severe thermal cycling, fatigue loads, or requiring extremely high structural integrity.
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