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Stainless Steel 321321H Pipe Fittings

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Stainless Steel 321321H Pipe Fittings Specification

Sealing Type
Metal to Metal

Coating Type
Uncoated / As Required

Thread Type
NPT, BSP

Tensile Strength
515 MPa min

Flexibility
Rigid

Yield Strength
205 MPa min

Temperature Range
-196C to 870C

Diameter
12.7 mm to 914.4 mm

Bend Radius
1D, 1.5D, 3D

Tolerance
0.5 mm

Connection Type
Welded, Threaded

Product Type
Pipe Fittings

Material
Stainless Steel 321/321H

Connection
Butt Weld, Socket Weld, Threaded

Shape
Elbow, Tee, Reducer, Coupling, Cap

Standard
ASTM A403, ASME SA403

Surface Treatment
Polished / Pickled

Outer Diameter
1/2 inch to 36 inch

Section Shape
Round

Length
As per requirement / standard

Thickness
1.5 mm to 12 mm

Color
Silver / Metallic

Usage
Industrial, Chemical, Petrochemical, Oil & Gas

Rated Pressure
Class 150 - 2500

Material Grade
SS 321 / 321H

Application
Pipeline, Processing Plants, Refineries

About Stainless Steel 321321H Pipe Fittings

What Are Specification Stainless Steel 321/321H Pipe Fittings?

Standards :	ASTM, ASME
Designation :	A 403, SA 403
Dimension Standard :	ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Grade :	Stainless Steel 304L Buttweld Pipe Fittings, SS 304L Butt weld
Type :	Seamless, Welded
Thickness :	Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS
Size :	1/2" to 24"
Two Joint / Two Halve 304 Butt weld Fittings Size :	6" to 48"
Types of Butt weld Fittings :	Equal Tee, Nipple, Long Radius Elbow, Reducing Tee, Elbows, Swage Nipple, Short Radius Elbow, Reducer, Barrel Nipple, 90 Deg Elbow, Concentric Reducer, Reducing Nipple, 45 Deg Elbows, Eccentric Reducer, Bend, 180 Deg Elbow, End Cap, 1D Elbow, 3D Elbow, Stubend, 5D Elbow, Cap, Piggable Bend, Long Stubend, Tee, Short Stubend, Long Radius Bend

Equivalent material Of Stainless Steel 321/321H Pipe Fittings?

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
SS 321	1.4449	S32100	SUS 321
SS 321H	1.4438	S32103	SUS 321L	X2CrNiMo18-15-4

Chemical Composition Of Stainless Steel 321/321H Pipe Fittings?

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	Fe
SS 321	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	18.00 20.00	3.00 4.00	11.00 15.00	57.845 min
SS 321H	0.035 max	2.0 max	1.0 max	0.045 max	0.030 max	18.00 20.00	3.00 4.00	11.00 15.00	57.89 min

Mechanical Properties Of Stainless Steel 321/321H Pipe Fittings?

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
7.9 g/cm3	1400 C (2550 F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %

Superior Material and Mechanical Properties

SS 321/321H Pipe Fittings offer high tensile (minimum 515 MPa) and yield (minimum 205 MPa) strength, paired with an elongation of at least 35%. These properties, along with a density of 7.9 g/cm and rigidity, make the fittings suitable for high-pressure and extreme temperature applications. The combination of durability and mechanical strength ensures consistent performance in critical operations.

Versatile Applications and Connection Options

Available in diameters ranging from 1/2 inch to 36 inch and thicknesses from 1.5 mm to 12 mm, these fittings fit a wide variety of pipeline systems. With options for metal-to-metal sealing, NPT/BSP threading, or butt weld and socket weld connections, SS 321/321H Pipe Fittings adapt to various requirements in processing plants, refineries, and pipelines. This makes them ideal for transporting fluids under tough industrial conditions.

Testing, Quality Assurance, and Packing

Every fitting undergoes rigorous quality testing, such as hydrostatic, PMI, ultrasonic, and radiography tests, to guarantee safety and compliance. The surface is treated (polished or pickled) and packed securely in wooden boxes, cartons, or customized packaging to prevent damage during shipment. This attention to quality ensures the fittings reach you in optimal condition and are reliable in the field.

FAQs of Stainless Steel 321321H Pipe Fittings:

Q: How are Stainless Steel 321/321H Pipe Fittings manufactured?

A: These fittings are fabricated using seamless, welded, or ERW processes as per industry standards. The choice of process depends on application needs, with each method ensuring structural integrity and precise dimensions.

Q: What is the benefit of using SS 321/321H Pipe Fittings in industrial applications?

A: SS 321/321H offers excellent corrosion resistance and mechanical strength, making it suitable for aggressive environments encountered in chemical, petrochemical, and oil & gas industries, especially where high temperature stability is required.

Q: When should I choose beveled, plain, or threaded ends for these pipe fittings?

A: The end type depends on your installation requirements: beveled ends are ideal for butt welding, plain ends for socket weld or slip-fit connections, and threaded ends for easy assembly and disassembly where welding is not desired.

Q: What testing is conducted to ensure the quality of these fittings?

A: Extensive testing, including hydrostatic, Positive Material Identification (PMI), ultrasonic, and radiography, is performed on each fitting to ensure safety, material integrity, and compliance with ASTM A403 and ASME SA403 standards.

Q: Where are SS 321/321H Pipe Fittings commonly used?

A: They are widely used in industrial pipelines, processing plants, refineries, and petrochemical installations, wherever resistance to corrosion and thermal stability are required.

Q: How should these pipe fittings be packed and transported?

A: To prevent damage and contamination, fittings are packed in sturdy wooden boxes, cartons, or as per customized requirements, ensuring safe delivery to their destination.

Q: What is the temperature range of SS 321/321H Pipe Fittings?

A: These fittings perform reliably in temperatures ranging from -196C to 870C, making them suitable for both cryogenic and elevated temperature environments.

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