ASTM A182 F304 F309h F310 F348 Stainless Steel Flange High Temperature

• Customization: Available
• Standard: ANSI, DIN, GB, JIS, GOST, BSW, ISO
• Type: Alloy Steel Flange
• Model NO.: ASTM A182 F304 F309H F310 F348 SS Flange Fitting
• Material: Alloy Steel
• Structure: Flanges
• Connection: Flanged
• Sealing Surface: RF/FM...
• Manufacturing Way: Press
• Materials: 304, 316, 317, 321, 347
• Surface Treatment: Anodizing,Plating,Polishing,etc
• Shape: Round/Customized
• Process: Polished/Solution Treatment
• Condition: Hot Finished/Cold Finished
• MOQ: 1
• Tolerance: +/-0.005~+/-0.01mm
• Stock: Size Can Customized
• Facing: FF, RF, Rj, FM, M, T, G, etc.
• OEM ODM: Accept
• Used: Factory, Wood House
• Packing: Standard Export Packing
• Delivery Time: 10-30 Working Days
• Size: DN 10 - DN 2000-----1/2"- 48"
• Thickness: as Per Client′s Design
• Transport Package: Cartons, Pallet, Cases
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10000 PCS/Year

Product Description

Product Description

 

Property	F304	F309H	F310	F348
Material Standard	ASTM A182	ASTM A182	ASTM A182	ASTM A182
Grade Type	Austenitic Stainless Steel	Austenitic Stainless Steel	Austenitic Stainless Steel	Stabilized Austenitic Stainless Steel
Chemical Composition	Cr: 18-20%, Ni: 8-11%, C: ≤0.08%	Cr: 22-24%, Ni: 12-15%, C: 0.04-0.10%	Cr: 24-26%, Ni: 19-22%, C: ≤0.25%	Cr: 17-19%, Ni: 9-13%, C: ≤0.08%, Nb: 10×C-1.0%
Mechanical Properties	Tensile: 515 MPa, Yield: 205 MPa	Tensile: 515 MPa, Yield: 205 MPa	Tensile: 515 MPa, Yield: 205 MPa	Tensile: 515 MPa, Yield: 205 MPa
Temperature Range	-425°F to 1500°F (-254°C to 816°C)	Up to 1800°F (982°C)	Up to 2100°F (1149°C)	-425°F to 1500°F (-254°C to 816°C)
Key Features	General corrosion resistance	High-temperature oxidation resistance	Extreme heat resistance, carburization resistance	Stabilized for intergranular corrosion resistance
Common Applications	Food processing, plumbing, mild chemical environments	Furnace parts, heat exchangers, high-temp piping	Petrochemical refineries, kilns, thermal reactors	Welded assemblies, sulfuric acid environments
Standards Compliance	ASME B16.5, B16.47, NACE MR0175	ASME B16.5, API 6A	ASME B16.5, NACE MR0103	ASME B16.5, NACE MR0175

1. Standard Overview

 

ASTM A182 is a standard specification for forged or rolled alloy - steel and stainless - steel pipe flanges, forged fittings, and valve parts for high - temperature service. The F304, F309H, F310, and F348 are different grades of stainless steel within this standard, each with unique characteristics and applications.

2. Material Characteristics

F304

 

• Chemical Composition: F304 is a commonly used austenitic stainless steel. It contains approximately 18 - 20% chromium and 8 - 10.5% nickel. This composition provides good corrosion resistance in a wide range of environments, including mild chemical and food - processing applications.
• Mechanical Properties: It has relatively high strength and good ductility. The yield strength is typically around 205 MPa, and the tensile strength is about 515 MPa. This makes it suitable for general - purpose applications where moderate strength and corrosion resistance are required.

F309H

 

• Chemical Composition: F309H contains a higher chromium (22 - 24%) and nickel (12 - 15%) content compared to F304. The "H" suffix indicates that it is a high - carbon version, which provides better high - temperature strength.
• Mechanical Properties: It offers excellent oxidation resistance at high temperatures. The high - temperature strength allows it to maintain its integrity in applications such as furnace parts and heat - treating equipment.

F310

 

• Chemical Composition: F310 has an even higher chromium (24 - 26%) and nickel (19 - 22%) content. This composition gives it outstanding resistance to oxidation and corrosion at elevated temperatures.
• Mechanical Properties: With high tensile and yield strength at high temperatures, F310 is suitable for use in extreme high - temperature environments, such as in the petrochemical industry for furnaces and incinerators.

F348

 

• Chemical Composition: F348 is similar to F304 but contains small amounts of niobium (columbium) and tantalum. These elements help to stabilize the steel against intergranular corrosion during welding and heat treatment.
• Mechanical Properties: It has good corrosion resistance and mechanical properties similar to F304. The addition of stabilizing elements makes it particularly suitable for applications where welding is involved, such as in the construction of pressure vessels and piping systems.

3. Application Areas

 

• F304: Widely used in the food and beverage industry, chemical processing plants for handling non - aggressive chemicals, and in architectural applications where appearance and corrosion resistance are important.
• F309H: Commonly found in high - temperature industrial furnaces, heat exchangers, and other equipment that operates at elevated temperatures for extended periods.
• F310: Applied in the petrochemical industry for components exposed to high - temperature and high - pressure conditions, such as furnace tubes and burner parts.
• F348: Often used in nuclear power plants, as well as in general industrial piping and pressure vessel applications where welded joints need to have good corrosion resistance.

4. Manufacturing and Quality Control

 

• Manufacturing: The flanges are typically manufactured through forging or rolling processes. These processes ensure the proper grain structure and mechanical properties of the material. After forming, the flanges may undergo machining operations to achieve the required dimensions and surface finish.
• Quality Control: To meet the ASTM A182 standard, strict quality control measures are in place. This includes chemical analysis to verify the correct composition, mechanical testing to ensure the required strength and ductility, and non - destructive testing (such as ultrasonic testing and magnetic particle inspection) to detect any internal or surface defects.

 

In conclusion, the ASTM A182 F304, F309H, F310, and F348 stainless steel flanges offer a range of options for different industrial applications based on their chemical compositions, mechanical properties, and corrosion - resistance capabilities. Each grade has its own niche in the market, providing solutions for various high - temperature and corrosive environments.

A182 Stainless Steel Flanges Chemical Compostion and Properties

The chemical composition of grade ASTM A182 Flange is outlined in the following table

Grade	C	Mn	P	S	Si	Ni	Cr	Mo	Nb	Ti	Others
A182 F304(1)	0.08	2.0	0.045	0.030	1.0	8.0-11.0	18.0-20.0
A182 F304H	0.04-0.10	2.0	0.045	0.030	1.0	8.0-11.0	18.0-20.0
A182 F304L(1)	0.030	2.0	0.045	0.030	1.0	8.0-13.0	18.0-20.0
A182 F304N(2)	0.08	2.0	0.045	0.030	1.0	8.0-10.5	18.0-20.0
A182 F304LN(2)	0.030	2.0	0.045	0.030	1.0	8.0-10.5	18.0-20.0
A182 F309H	0.04-0.10	2.0	0.045	0.030	1.0	12.0-15.0	22.0-24.0
A182 F310	0.25	2.0	0.045	0.030	1.0	19.0-22.0	24.0-26.0
A182 F310H	0.04-0.10	2.0	0.045	0.030	1.0	19.0-22.0	24.0-26.0
A182 F310MoLN	0.030	2.0	0.030	0.015	0.40	21.0-23.0	24.0-26.0	2.0-3.0			N 0.10-0.16
A182 F316	0.08	2.0	0.045	0.030	1.0	10.0-14.0	16.0-18.0	2.0-3.0
A182 F316H	0.04-0.10	2.0	0.045	0.030	1.0	10.0-14.0	16.0-18.0	2.0-3.0
A182 F316L(1)	0.030	2.0	0.045	0.030	1.0	10.0-15.0	16.0-18.0	2.0-3.0
A182 F316N(2)	0.08	2.0	0.045	0.030	1.0	11.0-14.0	16.0-18.0	2.0-3.0
A182 F316LN(2)	0.030	2.0	0.045	0.030	1.0	11.0-14.0	16.0-18.0	2.0-3.0
A182 F316Ti	0.08	2.0	0.045	0.030	1.0	10.0-14.0	16.0-18.0	2.0-3.0		(3)	N 0.10 max
A182 F317	0.08	2.0	0.045	0.030	1.0	11.0-15.0	18.0-20.0	3.0-4.0
A182 F317L	0.030	2.0	0.045	0.030	1.0	11.0-15.0	18.0-20.0	3.0-4.0
A182 F321	0.08	2.0	0.045	0.030	1.0	9.0-12.0	17.0-19.0			(4)
A182 F321H	0.04-0.10	2.0	0.045	0.030	1.0	9.0-12.0	17.0-19.0			(5)
A182 F347	0.08	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(6)
A182 F347H	0.04-0.10	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(7)
A182 F348	0.08	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(6)		Co 0.20 Ta 0.10
A182 F348H	0.04-0.10	2.0	0.045	0.030	1.0	9.0-13.0	17.0-20.0		(7)		Co 0.20 Ta

 

 

 

Technical Details

Pressure-Temperature Rating

The pressure-temperature rating is the maximum allowable working pressure (bar unit) of the material and grade used at the rated temperature (Celsius).

Temperature Consideration

Whether flange joints are used at high or low temperatures, leakage due to external forces and moments generated by the connected piping or equipment should be considered. To prevent leakage, pipe flanges and flanged fittings should avoid the application of severe external loads and sharp thermal gradients.

High Temperature

Application at temperatures in the creep range will result in decreasing bolt loads as relaxation of flanges, bolts, and gaskets takes place. Flanged joints subjected to thermal gradients may likewise be subject to decreasing bolt loads. Decreased bolt loads diminish the capacity of the flanged joint to sustain loads effectively without leakage. At temperatures above 200°C (400°F) for Class 150 and above 400°C (750°F) for other class designations, flanged joints may develop leakage problems unless care is taken to avoid imposing severe external loads, severe thermal gradients, or both.

Low Temperature

Some materials, especially some carbon steel materials, exhibit a significant decrease in ductility when used at low temperatures, and thus cannot withstand impact load, sudden stress changes, and high stress concentrations. Some regulations require an impact test even when the temperature is above -29 °C (−20°F).

 

Detailed Photos

 

 

 

 

 

Packaging & Shipping

Pressure Test

No pressure test is required on the flange.
Flanged fitting should be tested for shell pressure.

Shell Pressure Test for Flanged Fittings
The shell pressure test for flanged fittings shall be at a pressure no less than 1.5 times the 38°C (100°F) pressure rating rounded off to the next higher 1 bar (25 psi) increment.

Test Conditions
The shell pressure test for flanged fittings shall be at a pressure no less than 1.5 times the 38°C (100°F) pressure rating rounded off to the next higher 1 bar (25 psi) increment

Test Duration

Flanged Fittings Size	Duration, Sec
NPS ≤ 2	60
2 1/2 ≤ NPS ≤ 8	120
NPS ≥ 10	180