Stainless Steel 321321H Flanges

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Stainless Steel 321321H Flanges Specification

Purity
>99%

Grade
321 / 321H

Feature
Corrosion Resistance, High Temperature Resistance, Durability, Precise Dimensions

Dimension (L*W*H)
Custom as per Order

Application
Oil & Gas, Petrochemical, Power Plant, Chemical Industry, Shipbuilding, Paper & Pulp

Product Type
Flange

Material
Stainless Steel 321/321H

Standard
ASTM A182, ANSI B16.5, DIN, JIS, BS, GB, IS

Shape
Round

Surface
Polished / Machined

Connection
Welded, Screwed, Threaded

Technics
Forged

Pressure
150#, 300#, 600#, 900#, 1500#, 2500#

Size
1/2 to 60 (DN15DN1500)

Color
Silver / Metallic

About Stainless Steel 321321H Flanges

What Are Specification Stainless Steel 321/321H Flanges?

Specifications List	ASTM A182 / ASME SA182
Class / Pressure Rating	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Size Chart	1/2 (15 NB) to 48 (1200NB)
ASTM Standards	ANSI/ASME B16.5, B16.48, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc.
Standard s	ANSI, ASME, BS, DIN, EN etc.

Equivalent material Of Stainless Steel 321/321H Flanges?

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
SS 321	1.4541	S32100	SUS 321	X6CrNiTi18-10
SS 321H	1.4878	S32109	SUS 321H	X12CrNiTi18-9

Chemical Composition Of Stainless Steel 321/321H Flanges?

Grade	C	Mn	Si	P	S	Cr	N	Ni	Ti
SS 321	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 19.00	0.10 max	9.00 - 12.00	5(C+N) 0.70 max
SS 321H	0.04 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 19.00	0.10 max	9.00 12.00	4(C+N) 0.70 max

Mechanical Properties Of Stainless Steel 321/321H Flanges?

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1457 C (2650 F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %

Precision Engineering & Robust Design

Each Stainless Steel 321/321H flange is forged with meticulous attention to dimensional accuracy and surface finish, available in polished or machined options. The combination of precise manufacturing techniques and strict quality control guarantees secure, leak-proof connections under severe temperature and pressure conditions.

Versatile Application Across Industries

With their exemplary corrosion and high-temperature resistance, these flanges are the preferred choice for industries including oil & gas, chemical processing, shipbuilding, and paper & pulp. Their adaptability to various connection types and custom dimensions ensures seamless integration into complex piping systems and infrastructure.

FAQs of Stainless Steel 321321H Flanges:

Q: How are Stainless Steel 321/321H flanges typically used in industrial settings?

A: These flanges are designed for connecting pipes, valves, and other equipment in critical applications, including oil & gas plants, petrochemical complexes, and power generation facilities. Their robust material properties allow them to withstand corrosive substances and high operational temperatures, ensuring safe and long-lasting piping systems.

Q: What standards and certifications do Stainless Steel 321/321H flanges comply with?

A: They adhere to globally recognized standards such as ASTM A182, ANSI B16.5, and are also compliant with DIN, JIS, BS, GB, and IS standards. Furthermore, they are NACE MR0175 and IBR approved, confirming their suitability for sour service and boiler regulations, respectively.

Q: When should you choose 321/321H grade stainless steel flanges over other types?

A: Select 321/321H flanges when the application demands excellent resistance to high temperatures, up to 870C, and strong performance in environments exposed to corrosive elements, such as acids or chlorides. These grades are ideal for systems requiring both mechanical robustness and stability at elevated temperatures.

Q: What are the available connection types and flange faces offered?

A: Connection options include welded, screwed, and threaded types, providing installation flexibility. Available flange faces include Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ), each suited to specific sealing and operational requirements.

Q: How does the manufacturing process ensure the durability and precision of these flanges?

A: All flanges are produced through advanced forging techniques, followed by precise machining to obtain the required dimensions and finish. Rigorous inspection throughout production ensures each product meets stringent quality, hardness, and strength specifications.

Q: What are the main benefits of using Stainless Steel 321/321H flanges in piping systems?

A: The primary advantages include superior resistance to corrosion and oxidation, high temperature durability, structural reliability, and longevity in challenging operational environments. Their precise dimensions facilitate easy assembly and dependable, leak-tight joints.

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