Stainless Steel 321 / 321H Flanges Manufacturer in Mumbai, India

Largest Stainless Steel 321 / 321H Flanges Manufacturer & Supplier in Mumbai, India

Jai Hind Metal is a reliable manufacturer and supplier of Stainless Steel 321/321H Flanges, supplying quality piping components for customers across different industrial sectors. We recognize that every application can have its own requirements related to flange dimensions, material grade, pressure rating, and applicable standards, so our manufacturing process is planned around the specifications provided by the customer. Each flange is carefully examined before shipment for dimensional accuracy, surface quality, strength, and overall finish. Our inspection team performs checks at different stages of production to maintain consistency, and third-party inspection can also be arranged when requested. With well-managed stock and suitable storage facilities, we can support both regular procurement and urgent project requirements for customers around the world.

We give the same attention to product protection and order handling as we do to manufacturing. Stainless Steel 321/321H Flanges are securely packed with appropriate materials to help protect their surfaces from scratches, moisture, and transit-related damage. If a project requires particular packing methods, labeling, or additional protection, customized packaging can be arranged accordingly. Our team works with dependable logistics providers to coordinate shipments and help ensure delivery reaches the required destination safely and on schedule. By combining careful production, systematic inspection, secure packing, and responsive communication, Jai Hind Metal aims to make the overall buying process straightforward and dependable for every customer.

Precision Engineering

Precisely manufactured metal products meeting demanding industrial standards.

Quality Assured

Consistent quality, reliable performance, and strict inspection at every stage.

Custom Dimensions

Available in customized sizes, grades, thicknesses, and specifications.

Reliable Supply

Efficient processing, secure packaging, and dependable delivery worldwide.

Stainless Steel 321/321H Flanges are manufactured from high-quality austenitic stainless steel containing chromium, nickel, and titanium, providing excellent corrosion resistance, strength, and stability at elevated temperatures. These flanges are well suited for demanding service conditions and can be produced in various types, sizes, pressure ratings, and dimensions to meet specific piping requirements. The addition of titanium helps stabilize the material and reduces the risk of chromium carbide precipitation during prolonged exposure to high temperatures, making it suitable for welded and heat-intensive applications. SS 321 offers good formability and weldability, while SS 321H, with its higher carbon content, provides improved strength for high-temperature service. Their durability, thermal stability, and resistance to oxidation make Stainless Steel 321/321H Flanges a suitable choice for a wide range of industrial applications.

Stainless Steel 321H Pipe Flanges, ASTM A182 F321H Flange, Stainless Steel 321 Flange, 321 Stainless Steel Flanges, 321 SS Plate Flanges, SS 321H Flanges, UNS S32100 Flanges, ANSI B16.5 Stainless Steel 321 Flanges, 1.4541, 1.4878 Flanges, SS 321H Forged Flanges, UNS S32109 Flange, Stainless Steel 321 Flanges Manufacturer in Mumbai, India.

In the annealed condition, Stainless Steel 321/321H Flanges offer a strong combination of corrosion resistance, thermal stability, and mechanical strength, making them suitable for demanding industrial environments. They are commonly used in chemical processing equipment, heat exchangers, petrochemical plants, furnace components, aerospace systems, and high-temperature process piping where reliable performance is required. Both SS 321 and SS 321H are stabilized with titanium, which helps reduce chromium carbide precipitation during prolonged exposure to elevated temperatures and supports good corrosion resistance after welding. SS 321H has a higher carbon content than standard 321, providing improved strength for high-temperature service. With good weldability, durability, resistance to oxidation, and stability at elevated temperatures, Stainless Steel 321/321H Flanges are well suited for critical piping and equipment connections.

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Competitive Price of Stainless Steel 321H Slip on Flange, 321 Stainless Steel Pipe Flanges Trader, Largest Stockholder of Stainless Steel 321 Flanges in India, Ready Stock of X6CrNiTi18-10 Stainless Steel Flange, SS 321 SWRF Flanges, Stainless Steel 321H Reducing Flanges, Stainless Steel 321 Industrial Flanges, SS 321H Weld Neck Flanges, ASTM A182 F321 Socket weld Flanges Manufacturers in Mumbai, India.

Composition of Stainless Steel 304 / 304L Flanges

Stainless Steel 321 / 321H Flanges are primarily composed of iron, chromium, and nickel, with titanium added as a stabilizing element. The chromium content provides good resistance to corrosion and oxidation, while nickel contributes to strength, toughness, and stability in demanding environments. Titanium helps minimize chromium carbide precipitation during welding and prolonged exposure to elevated temperatures. Grade 321H contains a higher carbon level than standard 321, offering improved strength and creep resistance at high temperatures, making it well suited for applications involving sustained heat.

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Stainless Steel 321 / 321H Flanges Specification

A182 Gr F321 / 321H Flange Size Chart1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Stainless Steel 321 / 321H Flange StandardsANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
SS Grade F321 / 321H Flange Pressure Rating ANSIClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
ASTM A182 F321 / 321H Stainless Steel Flanges Pressure Calculation in DIN6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
ASME SA 182 F321 / 321H Flange5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
ASME SA182 321 / 321H Stainless Steel Flange UNI6Bar 10Bar 16Bar 25Bar 40Bar
A182 F321 / 321H Flange EN6Bar 10Bar 16Bar 25Bar 40Bar
CoatingOil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
Most common types of ASTM A182 F321 / 321H Stainless Steel FlangeForged / Threaded / Screwed / Plate
Test CertificatesEN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
ASME SA182M SS 321 / 321H Flange Production techniqueForged, Heat treated and machined
A182 Grade F321 / 321H Flange Connect Type/ Flange Face TypeRaised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Special design

As per your drawing

AS, ANSI, BS, DIN and JIS
15 NB (1/2″) to 200 NB (8″)
Equal and Reducing Configurations

ASME A182 SS 321 / 321H Flange TestDirect-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
ASTM A182 SS 321 / 321H Flange EquipmentPress machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
SS 321 / 321H Flange OriginIndian / West Europe / Japan / USA / Korean
Manufacturer of Stainless Steel ASTM A182 F321 / 321H Flange

ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
ASTM A182 F321 / 321H Flange: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange

B.S: BS4504 , BS3293, BS1560, BS10
AS 2129: Table D; Table E; Table H
ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
American standard (ANSI)
German (DIN)
British standard (BS)

DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 ASTM A182 F316 Stainless Steel Flanges
The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
ASME SA182M Stainless Steel 321 / 321H Flange Uses & applicationBitumen upgraders.
Heavy oil refineries.
Nuclear power (mostly seamless).
Petrochemicals and acids.
SS 321 / 321H EN 1092-1 Flange Export toIreland, Singapore, Indonesia, Ukraine, Saudi & Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE

Manufacturing Standards / Pressure Rating of Stainless Steel 321 / 321H Pipe Flanges

ASME/ANSI B 16.5Blind Flange, High Hub Blind Flange, Slip on Flange, Welding Neck Flange, Socket Weld Flange, Ring Type Joint Flange, Lap Joint Flange, Threaded Flange
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47Blind Flange [Series A & B],Welding Neck Flange
PRESSURE CLASS75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36Slip on Flange, Threaded Flange, Welding Neck Flange,
PRESSURE CLASS300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange, Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange,
PRESSURE CLASSPN 2.5 TO PN 40
BS 4504[PART 1]Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASSPN 2.5 TO PN 400
BS 1560 BOSSPlate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
BS10Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLED, E, F, H
DIN FLANGESDIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASSPN 6 TO PN 100

 

ANSI B16.5 Stainless Steel 321 / 321H Flange Forms & Availability

ASTM A182 SS F321 / 321H Slip-On FlangesASTM A182 SS F321 / 321H Threaded FlangesSizes 1/8″ – 36″
Raised Face or Flat Face
ASTM A182 SS F321 / 321H Weld Neck FlangesASTM A182 SS F321 / 321H Socket Weld Flanges
ASTM A182 SS F321 / 321H Blind FlangesASTM A182 SS F321 / 321H Reducing Flanges
ASTM A182 SS F321 / 321H Lap Joint FlangesASTM A182 SS F321 / 321H Plate Flanges
ASTM A182 SS F321 / 321H Orifice FlangesASTM A182 SS F321 / 321H Forged Flanges
ASTM A182 SS F321 / 321H Ring Type Joint FlangesASTM A182 SS F321 / 321H Square Flanges

 

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Equivalent Grades Stainless Steel 321 / 321H Flanges

STANDARDWERKSTOFF NR.UNSJISEN
SS 3211.4541S32100SUS 321X6CrNiTi18-10
SS 321H1.4878S32109SUS 321HX12CrNiTi18-9

 

Chemical Composition of Stainless Steel 321 / 321H Plate Flanges

GradeCMnSiPSCrNNiTi
SS 3210.08 max2.0 max1.0 max0.045 max0.030 max17.00 – 19.000.10 max9.00 – 12.005(C+N) – 0.70 max
SS 321H0.04 – 0.102.0 max1.0 max0.045 max0.030 max17.00 – 19.000.10 max9.00 – 12.004(C+N) – 0.70 max

 

Mechanical Properties of Stainless Steel A182 321 / 321H Forged Flanges

GradeDensityMelting PointTensile StrengthYield Strength (0.2%Offset)Elongation
304 / 304L8.0 g/cm31400 °C (2550 °F)Psi – 75000 , MPa – 515Psi – 30000 , MPa – 20535 %

Stainless Steel 321 / 321H Flanges Standard

American Steel Flanges Standard
Standard CodeStandard Name
ANSI ASME SA-182Forged Flanges
ANSI ASME B16.5Slip on flange, Welding neck flange, Blind flange, Threaded flange, Lap joint flange, RTJ flange
ASME – B 16.47Welding neck flange, Blind flange
ASME – B 16.36Welding neck flange Slip on flange
German Steel Flanges Standard
DIN 2527Steel Blind Flanges, BLRF
DIN 2573 / 2576Flat Flange for Welding (Slip On)
DIN 2673Loose Flanges and Rings for Welding (Slip On Flanges and Plain Collars)
DIN 2641 / 2642Lapped / Loose (Lap Joint) Flanges Plain Collars
DIN 28115Long Neck Welding Flanges
DIN PN10, PN16SS 321 PN10 Flanges, 321H SS DIN PN 10 Flanges, 321 SS PN16 Flange
DIN PN20, PN25SS 321 PN20 Flanges, 321H SS DIN PN 25 Flanges
DIN PN40, PN50SS 321 PN40 Flanges, 321H SS DIN PN 50 Flanges
Japanese Steel Flanges Standard
JIS B2220Slipon plate flange (SOP), Slipon Hub (SOH), Socket Welding flange (SW), Welding neck flange (WN), Lapjoint (LJ), Threaded flange (TR)/ Itegral flange (IT) Blank flange (BL)
JIS B2291Slipon plate flange (SOP), Slipon Hub (SOH), Socket Welding flange (SW), Welding neck flange (WN), Lapjoint (LJ), Threaded flange (TR)/ Itegral flange (IT) Blank flange (BL)
JIS 5K, 10KSS 321 5K SORF Flanges, 321H SS 10K SOFF Flanges
JIS 16K, 20KSS 321 16K Blind Flanges, 321H SS 20K BLRF Flanges
JIS 30K, 40KSS 321 30K Slip on Flanges, 321H SS 40K Blind Flanges
Italian Flanges Standard
UNI FLANGESPlan flanges (2276, 2277, 2278, 6083, 6084) Welding neck (2280, 2281, 2282, 2283, 2284, 2285, 2286) Lapped flanges (6088, 6089, 6090, 2999, 2300) Blind flanges (6091, 6092, 6093, 6094, 6095, 6096, 6097) threaded flanges (2253, 2254)
British Standard Pipe Flanges Standard
BS 10 Table DSS 321 BS 10 Table D Flanges, 321H Table D Pipe Flange
BS 10 Table ESS 321 BS 10 Table E Flanges, 321H Table E Pipe Flange
BS 10 Table FSS 321 BS 10 Table E Flanges, 321H Stainless Steel Table E Flanges
BS 10 Table HSS 321 BS 10 Table E Flanges, Stainless Steel 321H Table E Pipe Flanges

 

Schedule / Class of Stainless Steel 321 / 321H Flanges

Flange Schedule/ClassPipe Size – Pipe FlangesFlange Connection TypeFlange MaterialMax. Pressure
ASME B16.5 Class 1501/2″FNPTStainless Steel 321 / 321H Flanges150 psi
ASME B16.5 Class 1501/2″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1501/2″WeldedStainless Steel 321 / 321H Flanges150 psi
ASME B16.5 Class 1503/4″FNPTStainless Steel 321 / 321H Flanges150 psi
ASME B16.5 Class 1503/4″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1501-1/4″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1501-1/2″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1502″FNPTStainless Steel 321 / 321H Flanges150 psi
ASME B16.5 Class 1502″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1502-1/2″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1503″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 1504″FNPTStainless Steel 321 / 321H Flanges150 psi
ASME B16.5 Class 1504″Socket WeldStainless Steel 321 / 321H Flanges275 psi
ASME B16.5 Class 3001/2″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001/2″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001-1/4″FNPTStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001-1/4″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001-1/2″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3001-1/2″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3002″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3002″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3002-1/2″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3002-1/2″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3003″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3003″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3004″Slip OnStainless Steel 321 / 321H Flanges720 psi
ASME B16.5 Class 3004″Slip OnStainless Steel 321 / 321H Flanges720 psi

 

Stainless Steel 321 / 321H Flanges Ready Stock in India

321H Stainless Steel Blind FlangeSS 321 Flat Flange Supplier in India
Stainless Steel UNS S32100 Flanges ManufacturerStainless Steel 321 Slip on Flanges
Stainless Steel 321 Weld Neck FlangesSS 321H Socket weld Flanges Dealer in India
SS 321H Long Weld Neck Flanges StockistASTM A182 F321 SS Threaded Flanges
Stainless Steel 321 Flanges Supplier in IndiaStainless Steel EN 1092-1 Plate Flanges
Stainless Steel 321H Forged Flanges WholesalerSS UNS S32109 Lap Joint Flanges Supplier
Stainless Steel 321 BLRF Flange ManufacturerStainless Steel 321 Raised Face Flanges
F321 Stainless Steel NipoflangeStainless Steel SUS 321 Reducing Flanges
ANSI B16.5 Stainless Steel 321 Pipe FlangeSS 321 Ring Type Joint Flanges
1.4541 Stainless Steel Orifice FlangeStainless Steel 321 Spectacle Blind Flanges Stockists
Stainless Steel 321 PN 10 Flange321H PN 16 Stainless Steel Flanges Stockists
Stainless Steel 321H DIN FlangesINOX 1.4878 SS SORF Flanges Exporter
ASME B16.5 Stainless Steel 321H FlangesASTM A182 321 Tongue & Groove Flanges
SS 321H Male & Female FlangesStainless Steel 321 RTJF Flanges
ASTM A182 SS 321H Screwed FlangesASME SA182 SS321 Expander Flanges
321H SS Spades Ring Spacers FlangesASME SA182 Stainless Steel 321 Flat Face Flange
321H SS 5K SOFF FlangesStainless Steel 321 10K Flanges
INOX 1.4541 Puddle Flanges ExporterStainless Steel 321 Socket Welding Flange
Grade 321 Stainless Steel Weldo Flanges321H Stainless Steel Nipo Flanges
SUS 321 Long Weld Neck FlangesASTM A182 F321H Flanges Facing Type & Finish
321 SS BS Standard Table E FlangeSS 321H British Standard Table D Pipe Flanges
F321H Long Welding Neck FlangeGrade 321 Stainless Steel Raised Face Flange
ASME SA182 Stainless Steel 321 Spectacle Blind Flanges321H Stainless Steel BLRF Flanges Supplier
Stainless Steel 321 High Hub Blinds FlangesF321H Flanges Facing Type & Finish
X6CrNiTi18-10 SS Forging Facing Flanges DealerStainless Steel 321 Weld Neck Flanges A / B Stockist
Stainless Steel 321 Plate Flange Supplier in MumbaiSS 321H Loose Flanges Manufacturer in India
Stainless Steel 1.4878 Flanges DimensionsStainless Steel 321H Spades Ring Spacers Flanges
Wrought Austenitic Stainless Steel 321 FlangesASTM A182 F321 Expander Flanges at Best Price
SS X12CrNiTi18-9 Reducing Flanges SupplierSuppliers of 321H Stainless Steel Welding Neck Flange
 

 

Stainless Steel 321 / 321H Flanges can be supplied in either Pipe or Plate construction and are covered by specification ASTM A182 and ASME B16.5.

Stainless Steel 321 / 321H Flanges are available in pipe or plate construction and are manufactured according to recognized industry standards. These flanges are generally supplied as per ASTM A182 material specifications and ASME B16.5 dimensional requirements, providing dependable dimensional accuracy, material quality, and compatibility with a wide range of industrial piping systems.

Stainless Steel 321 / 321H Flanges Production Range

Stainless Steel 304 Weld Neck Flanges

Stainless Steel 304 Slip on Flanges

Stainless Steel 304 Blind Flanges

Stainless Steel 304 Socket weld Flanges

Stainless Steel 304 Threaded Flanges

Stainless Steel 304 Lap Joint Flanges

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We offer These Stainless Steel 321 / 321H Flanges as per DIN, ISO, JIS or ANSI Standard.

We offer Stainless Steel 321 / 321H Flanges in accordance with international standards such as DIN, ISO, JIS, and ANSI, allowing them to meet the varied requirements of industrial piping systems. Our flanges are supplied in different sizes, dimensions, pressure classes, and configurations to suit specific project needs. At Jai Hind Metal, we emphasize dependable quality, dimensional consistency, and reliable performance while supplying SS 321 / 321H Flanges according to applicable standards and customer specifications. For product details, specifications, or customized requirements, email us at info@jaihindmetal.com.

Stainless Steel 321 / 321H Flanges are commonly used to create secure connections between pipes, valves, pumps, and other components in industrial piping systems. Their excellent resistance to oxidation, corrosion, and elevated temperatures makes them suitable for applications where piping equipment is exposed to continuous heat. These flanges are widely used in chemical processing, petrochemical plants, oil and gas, power generation, heat exchangers, thermal processing equipment, aerospace applications, and high-temperature industrial piping systems. Grade 321H is particularly suitable for services requiring enhanced strength at elevated temperatures.

Uses & Applications of Stainless Steel 321 / 321h Flanges

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High-strength nickel alloys and specialty metals are selected for aerospace applications where lightweight performance, strength and resistance to extreme temperatures are essential.

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