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ASTM A182 F9 flanges are forged 9Cr 1Mo alloy steel flanges made for high temperature piping. Their 9 percent chromium content provides better oxidation resistance at elevated temperatures than F5, F11 or F22 grades. These flanges are available in Weld Neck, Slip On, Socket Weld, Threaded and Blind types, depending on pipe size and project specifications. They are used in refineries, petrochemical plants and power plants where chrome moly piping materials are specified. Solitaire Overseas ships ASTM A182 F9 flanges with EN 10204 3.1 certificates and full material traceability for domestic and export orders.
| Parameter | Detail |
|---|---|
|
Material specification |
ASTM A182 / ASME SA182 Grade F9 |
|
Alloy |
9Cr 1Mo, UNS K90941, Werkstoff 1.7386 |
|
Dimensional standard |
ASME B16.5 for NPS 1/2 to 24. ASME B16.47 for large diameter sizes |
|
Pressure class |
Class 150, 300, 600, 900, 1500 and 2500 where the flange type is rated in B16.5 |
|
Flange types |
Weld neck, slip on, blind, socket weld, threaded, lap joint |
|
Face type |
Raised face (RF), flat face (FF), ring type joint (RTJ) |
|
Heat treatment |
Annealed, or normalised and tempered, per ASTM A182 |
|
Testing |
Chemical and mechanical tests, hardness, PMI, UT and MPI on request |
|
Documents |
EN 10204 3.1 MTC, 3.2 with third party inspection on request |
| Grade | C | Mn | P max | S max | Si | Cr | Mo |
|---|---|---|---|---|---|---|---|
|
A182 F9 |
0.15 max |
0.30 to 0.60 |
0.030 |
0.030 |
0.50 to 1.00 |
8.00 to 10.00 |
0.90 to 1.10 |
| Grade | Tensile min MPa (ksi) | Yield min MPa (ksi) | Elongation min % | Reduction of area min % | Hardness HBW |
|---|---|---|---|---|---|
|
A182 F9 |
585 (85) |
380 (55) |
20 |
40 |
179 to 217 |
| Item | Detail |
|---|---|
|
Forged flange and fitting |
ASTM A182 F9 |
|
Alloy |
9Cr 1Mo |
|
UNS |
K90941 |
|
Werkstoff |
1.7386 |
|
Matching pipe |
ASTM A335 P9 |
|
Matching butt weld fitting |
ASTM A234 WP9 |
| Nominal Pipe Size | 150# Flange | 300# Flange | 600# Flange | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # Studs / Bolts | Diameter (in) | Length (1/16" RF) | # Studs / Bolts | Diameter (in) | Length (1/16" RF / RTJ) | # Studs / Bolts | Diameter (in) | Length (1/4" RF / RTJ) | |
|
1/2" |
4 |
0.50 |
2-1/4" |
4 |
0.50 |
2-1/2" / 3" |
4 |
0.50 |
3" / 3" |
|
3/4" |
4 |
0.50 |
2-1/2" |
4 |
0.63 |
3" / 3-1/2" |
4 |
0.63 |
3-1/2" / 3-1/2" |
|
1" |
4 |
0.50 |
2-1/2" |
4 |
0.63 |
3" / 3-1/2" |
4 |
0.63 |
3-1/2" / 3-1/2" |
|
1-1/4" |
4 |
0.50 |
2-3/4" |
4 |
0.63 |
3-1/4" / 3-3/4" |
4 |
0.63 |
3-3/4" / 3-3/4" |
|
1-1/2" |
4 |
0.50 |
2-3/4" |
4 |
0.75 |
3-1/2" / 4" |
4 |
0.75 |
4-1/4" / 4-1/4" |
|
2" |
4 |
0.63 |
3-1/4" |
8 |
0.63 |
3-1/2" / 4" |
8 |
0.63 |
4-1/4" / 4-1/4" |
|
2-1/2" |
4 |
0.63 |
3-1/2" |
8 |
0.75 |
4" / 4-1/2" |
8 |
0.75 |
4-3/4" / 4-3/4" |
|
3" |
4 |
0.63 |
3-1/2" |
8 |
0.75 |
4-1/4" / 4-3/4" |
8 |
0.75 |
5" / 5" |
|
3-1/2" |
8 |
0.63 |
3-1/2" |
8 |
0.75 |
4-1/4" / 5" |
8 |
0.88 |
5-1/2" / 5-1/2" |
|
4" |
8 |
0.63 |
3-1/2" |
8 |
0.75 |
4-1/2" / 5" |
8 |
0.88 |
5-3/4" / 5-3/4" |
|
5" |
8 |
0.75 |
3-3/4" |
8 |
0.75 |
4-3/4" / 5-1/4" |
8 |
1.00 |
6-1/2" / 6-1/2" |
|
6" |
8 |
0.75 |
4" |
12 |
0.75 |
4-3/4" / 5-1/2" |
12 |
1.00 |
6-3/4" / 6-3/4" |
|
8" |
8 |
0.75 |
4-1/4" |
12 |
0.88 |
5-1/2" / 6" |
12 |
1.13 |
7-1/2" / 7-3/4" |
|
10" |
12 |
0.88 |
4-1/2" |
16 |
1.00 |
6-1/4" / 6-3/4" |
16 |
1.25 |
8-1/2" / 8-1/2" |
|
12" |
12 |
0.88 |
4-3/4" |
16 |
1.13 |
6-3/4" / 7-1/4" |
20 |
1.25 |
8-3/4" / 8-3/4" |
|
14" |
12 |
1.00 |
5-1/4" |
20 |
1.13 |
7" / 7-1/2" |
20 |
1.38 |
9-1/4" / 9-1/4" |
|
16" |
16 |
1.00 |
5-1/4" |
20 |
1.25 |
7-1/2" / 8" |
20 |
1.50 |
10" / 10" |
|
18" |
16 |
1.13 |
5-3/4" |
24 |
1.25 |
7-3/4" / 8-1/4" |
20 |
1.63 |
10-3/4" / 10-3/4" |
|
20" |
20 |
1.13 |
6-1/4" |
24 |
1.25 |
8" / 8-3/4" |
24 |
1.63 |
11-1/4" / 11-1/2" |
|
24" |
20 |
1.25 |
6-3/4" |
24 |
1.50 |
9" / 10" |
24 |
1.88 |
13" / 13-1/4" |
| Nominal Pipe Size (NPS) | Flange Outside Dia (OD) | Flange Thickness min (T) | Hub Dia at Base (X) | Length Thru Hub (Y) | Number of Bolt Holes |
|---|---|---|---|---|---|
|
1/2" |
3.50 in (88.9 mm) |
0.44 in (11.2 mm) |
1.19 in (30.2 mm) |
1.88 in (47.8 mm) |
4 |
|
1" |
4.25 in (108.0 mm) |
0.56 in (14.2 mm) |
1.94 in (49.3 mm) |
2.19 in (55.6 mm) |
4 |
|
2" |
6.00 in (152.4 mm) |
0.75 in (19.1 mm) |
3.06 in (77.7 mm) |
2.50 in (63.5 mm) |
4 |
|
4" |
9.00 in (228.6 mm) |
0.94 in (23.9 mm) |
5.31 in (134.9 mm) |
3.00 in (76.2 mm) |
8 |
|
6" |
11.00 in (279.4 mm) |
1.00 in (25.4 mm) |
7.56 in (192.0 mm) |
3.50 in (88.9 mm) |
8 |
| Nominal Pipe Size (NPS) | Flange Outside Dia (OD) | Flange Thickness min (T) | Hub Dia at Base (X) | Length Thru Hub (Y) | Number of Bolt Holes |
|---|---|---|---|---|---|
|
1/2" |
3.75 in (95.3 mm) |
0.56 in (14.2 mm) |
1.50 in (38.1 mm) |
2.06 in (52.3 mm) |
4 |
|
1" |
4.88 in (124.0 mm) |
0.69 in (17.5 mm) |
2.12 in (53.8 mm) |
2.44 in (62.0 mm) |
4 |
|
2" |
6.50 in (165.1 mm) |
0.88 in (22.4 mm) |
3.31 in (84.1 mm) |
2.75 in (69.9 mm) |
8 |
|
4" |
10.00 in (254.0 mm) |
1.25 in (31.7 mm) |
5.75 in (146.1 mm) |
3.38 in (85.9 mm) |
8 |
|
6" |
12.50 in (317.5 mm) |
1.44 in (36.6 mm) |
8.12 in (206.2 mm) |
3.88 in (98.6 mm) |
12 |
ASTM A182 F9 flanges are forged 9Cr 1Mo chrome moly alloy steel flanges made for high temperature piping, with 8 to 10 percent chromium.
F5 has 4 to 6 percent chromium and 0.5 percent molybdenum. F9 has 8 to 10 percent chromium and 1 percent molybdenum, so it resists oxidation better.
Yes, ASTM A182 F9 flanges are suitable for elevated temperature services in refineries, power plants and petrochemical facilities.
The limit depends on pressure, design code and the allowable stress tables for the grade. Take the figure from the design code and ASME B16.5, not from a general number.
They resist oxidation and scaling at high temperature. They are not made for strongly corrosive chemical service.
PWHT may be required, depending on thickness, welding procedure, service and the construction code. Follow the approved procedure.
Minimum tensile strength is 585 MPa (85 ksi) and minimum yield strength is 380 MPa (55 ksi), with 20 percent elongation and 40 percent reduction of area.
Each lot ships with an EN 10204 3.1 mill test certificate. Third party inspection under EN 10204 3.2 is available on request.
Contact Solitaire Overseas for expert guidance and the right ASTM A182 F9 flange for your project, or send your enquiry here.