Stainless Steel · Ferrous

Flanges

Name: Stainless Steel Flanges
Brand: Ritvik Metal Impex
SKU: RMI-004

Weld neck, slip-on, blind, socket weld, lap joint, spectacle, ring joint and orifice flanges in Stainless Steel (ASTM A182 F304/316/321), Carbon Steel (ASTM A105) and Duplex Steel (UNS S31803/S32750). Sizes 1/2" to 24" NB, Class 150# to 2500#.

Material

Stainless Steel

Form

Flanges

Flanges Specifications

Chemical Composition for Flanges supplied by Ritvik Metal Impex
Grade	C	Mn	P	S	Si	Cr	Ni	Mo	Other
TP 304	0.08	2.00	0.045	0.030	1.00	18.0–20.0	8.0–11.0	—	N 0.10
TP 304L	0.035	2.00	0.045	0.030	1.00	18.0–20.0	8.0–13.0	—	N 0.10
TP 316	0.08	2.00	0.045	0.030	1.00	16.0–18.0	11.0–14.0	2.00–3.00	N 0.10
TP 316L	0.035	2.00	0.045	0.030	1.00	16.0–18.0	10.0–15.0	2.00–3.00	N 0.10
TP 321	0.08	2.00	0.045	0.030	1.00	17.0–19.0	9.0–12.0	—	Ti ≥ 5 × C
TP 347	0.08	2.00	0.045	0.030	1.00	17.0–19.0	9.0–13.0	—	Nb ≥ 10 × C
TP 310S	0.08	2.00	0.045	0.030	1.00	24.0–26.0	19.0–22.0	—	—
TP 317L	0.035	2.00	0.045	0.030	1.00	18.0–20.0	11.0–15.0	3.00–4.00	N 0.10

Note: Per ASTM A312 / A240. Values are maximum % by weight unless a range is shown. ASTM A312 permits 0.035% max carbon on L grades, where ASTM A240 plate specifies 0.030% max.

Mechanical Properties for Flanges supplied by Ritvik Metal Impex
Grade	Tensile Strength (min)	Yield Strength 0.2% (min)	Elongation (min)	Hardness (max)
TP 304	515 MPa (75 ksi)	205 MPa (30 ksi)	35%	90 HRB / 192 HBW
TP 304L	485 MPa (70 ksi)	170 MPa (25 ksi)	35%	90 HRB / 192 HBW
TP 316	515 MPa (75 ksi)	205 MPa (30 ksi)	35%	90 HRB / 192 HBW
TP 316L	485 MPa (70 ksi)	170 MPa (25 ksi)	35%	90 HRB / 192 HBW
TP 321	515 MPa (75 ksi)	205 MPa (30 ksi)	35%	90 HRB / 192 HBW
TP 347	515 MPa (75 ksi)	205 MPa (30 ksi)	35%	90 HRB / 192 HBW
TP 310S	515 MPa (75 ksi)	205 MPa (30 ksi)	35%	90 HRB / 192 HBW

Note: Specified minimum values in the solution-annealed condition, per ASTM A312 / A240. Elongation is measured in 50 mm (2 in.).

Size Range & Supply Condition for Flanges supplied by Ritvik Metal Impex
Parameter	Range
Size range	1/2" NB to 24" NB (ASME B16.5); 26" to 60" NB (ASME B16.47 Series A / B)
Pressure class	Class 150#, 300#, 400#, 600#, 900#, 1500#, 2500#
Types	Weld neck, slip-on, blind, socket weld, lap joint, threaded, reducing, spectacle blind, ring joint, orifice, long weld neck
Facing	Raised face (RF), flat face (FF), ring type joint (RTJ), tongue & groove, male & female
Face finish	Serrated spiral, serrated concentric, smooth — 125 to 250 AARH
Standards	ASME B16.5, B16.47, B16.36, B16.48, MSS SP-44, EN 1092-1, DIN, JIS, BS

Physical Properties for Flanges supplied by Ritvik Metal Impex
Property	SS 304 / 304L	SS 316 / 316L
Density	8.00 g/cm³	8.00 g/cm³
Melting range	1400–1450 °C	1375–1400 °C
Modulus of elasticity	193 GPa	193 GPa
Thermal conductivity (100 °C)	16.2 W/m·K	16.3 W/m·K
Specific heat (0–100 °C)	500 J/kg·K	500 J/kg·K
Thermal expansion (0–100 °C)	17.2 µm/m·°C	15.9 µm/m·°C
Electrical resistivity	720 nΩ·m	740 nΩ·m
Max continuous service temp.	≈ 870 °C	≈ 925 °C
Magnetic response (annealed)	Non-magnetic	Non-magnetic

Note: Values at 20 °C unless stated. Thermal expansion matters when austenitic stainless is welded to carbon steel.

Equivalent Grades Across Standards for Flanges supplied by Ritvik Metal Impex
ASTM / AISI	UNS	EN / DIN	EN Name	JIS	GB
304	S30400	1.4301	X5CrNi18-10	SUS 304	06Cr19Ni10
304L	S30403	1.4307	X2CrNi18-9	SUS 304L	022Cr19Ni10
316	S31600	1.4401	X5CrNiMo17-12-2	SUS 316	06Cr17Ni12Mo2
316L	S31603	1.4404	X2CrNiMo17-12-2	SUS 316L	022Cr17Ni12Mo2
321	S32100	1.4541	X6CrNiTi18-10	SUS 321	06Cr18Ni11Ti
347	S34700	1.4550	X6CrNiNb18-10	SUS 347	06Cr18Ni11Nb
310S	S31008	1.4845	X8CrNi25-21	SUS 310S	06Cr25Ni20
430	S43000	1.4016	X6Cr17	SUS 430	10Cr17

Note: Cross-reference for enquiries written against European, Japanese or Chinese standards. Equivalents are close but not always identical — check the composition limits before substituting.

Ordering & Supply for Flanges supplied by Ritvik Metal Impex
Parameter	Detail
Minimum order quantity	5 kg (mixed sizes within a grade can be combined to reach the MOQ)
Price basis	Ex-works Mumbai, FOB or CIF — quoted per kg, per metre or per piece depending on the form
Lead time	Ready stock dispatched in 1–3 working days; mill orders typically 2–6 weeks
Certification	Mill test certificate to EN 10204 3.1 as standard; 3.2 with third-party witness, IBR and NACE MR0175 on request
Testing available	PMI, IGC (ASTM A262), hydrostatic, ultrasonic, radiographic, impact and hardness testing
Third-party inspection	Bureau Veritas, TÜV, DNV, SGS, Lloyd's Register, Intertek, RITES and client/EPC inspection
Packing	Wooden crates or pallets, plastic caps on pipe ends, VCI wrapping where required, seaworthy export packing
Payment terms	Advance, against proforma invoice, or LC at sight for export orders
Supply area	Across India and export to the Middle East, Europe, the USA, Africa and South East Asia
Product form	Flanges

Note: Cut lengths, non-standard sizes and special certification are available on request. Prices are quoted against grade, size, schedule and quantity.

Values shown are the specified minima and maxima published in the governing standards and are given for guidance. The mill test certificate supplied with your consignment reports the actual results for that heat.

Product Guide & Technical Article

Industrial Flanges: Types, Grades & Selection Guide

Flanges are critical pipe connection components that allow for easy assembly, disassembly, and maintenance of piping systems. They are used wherever pipes, valves, pumps, and equipment need to be securely connected.

Types of Flanges

Weld Neck flanges offer the highest integrity for critical service. Slip-On flanges are economical and easy to align. Blind flanges seal pipe ends. Socket Weld flanges suit small bore high-pressure lines. Lap Joint flanges allow rotation for bolt alignment. Spectacle blinds isolate sections for maintenance. Ring Joint flanges are used in high-pressure oil & gas service.

Pressure Ratings

Flanges are rated from Class 150# (low pressure) to Class 2500# (extreme pressure). The class determines the wall thickness, bolt circle, and number of bolts required for the connection.

Material Grades

Carbon Steel (ASTM A105), Stainless Steel (ASTM A182 F304/F304L/F316/F316L/F321/F347), Alloy Steel (ASTM A182 F5/F9/F11/F22/F91), Duplex Steel (UNS S31803/S32750), and Nickel Alloys.

Standards

Manufactured to ASME B16.5 (1/2" to 24" NB) and ASME B16.47 (26" to 60" NB) dimensional standards, with face finishes including raised face (RF), flat face (FF), and ring type joint (RTJ).

About Our Flanges Supply

Ritvik Metal Impex is a trusted Stainless Steel Flanges supplier and stockist based in Mumbai, Maharashtra. We supply flanges across India including Mumbai, Pune, Delhi, Ahmedabad, Chennai, Hyderabad, Surat, and Bangalore, as well as export to UAE, Saudi Arabia, UK, USA, and South East Asia. Our flanges are sourced from reputed mills with full material traceability and supplied with Mill Test Certificates (MTC). We offer competitive pricing, ready stock for standard sizes, and fast dispatch for urgent requirements. Contact us for the best Stainless Steel flanges price in India.

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Technical Guides

In-depth reading on grades, standards and specification for this product.

Grade Selection

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Tell us the grade, size, schedule and quantity and we will confirm stock position and a firm price. Every consignment ships with a mill test certificate traceable to the heat number.

+91 7073895597|suresh.prajapat@ritvikmetalimpex.com

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Flanges

Flanges Specifications