About Oshwin – Stainless Steel Pipe/ Tubes Manufacturers in India
304/ 316L grade stainless steel Pipes and Tubes Manufacturer
SS 304 seamless, ERW pipes, Stainless Steel 304, 304L Pipes, Stainless Steel 304L Tubes Manufacturers in India, Stainless Steel 316/316L pipes and tubes exporter, stainless steel 316/316L grade butt weld fittings including SS 316L elbow, SS 316L bends, SS 316L tees, SS 316L reducers and SS 316L caps suppliers in UAE, Singapore & Malaysia
Since Oshwin Overseas was founded in 1982, the company has experienced consistent growth, reflecting customer satisfaction with the products and services received. Management has decades of experience in the metals industry
We serve customers of ALL sizes from ALL over the world. Supplying, processing and custom fabricating specialty metals for various industries including mining, chemical process, oil & gas, power generation, pulp and paper, petrochemical and more.
We are committed to elevate the standards of our products and services to offer customer satisfaction through excellence in quality. Every employee is dedicated toward this aim and every measure and care is taken to ensure production of superior products, quality packaging, timely delivery, competent prices and excellent after sales service.
Quality comes first
From the receipt of raw materials to the final inspection of the finished products – we do everything we can to ensure our customers receive only the very best quality.
Of course, all tubes of a non-destructive and / or destructive testing may be subjected. We have the HP-0 approval by the TÜV and also meet many other quality requirements.
Areas of application
The production of stainless steel pipes made exclusively from individual metal sheets. The metal sheets are formed and is rounded to either three-roller bending machines or on a press brake. The pipes are manufactured by us eg in chemical plants, the oil and gas industry, mechanical engineering, industrial furnace and marine engineering application.
|Sr. No.||Process Operation||Quality Characteristics||Method Of Control|
|1||Raw Material (Strip)||1> Dimensions
2> Chemical analysis
3> Control of Slit which within specified limits
|Actual measurement as per Std.
Analysis of all elements as per Std
Testing as per various Std.
Measurement of width, thickness & recording visual inspection.
|2||Tube Mill (GTAW Type)||1> Weld Test, Flare Flanges, Flattering Reverse bend & Reverse Flattening.
2> Inspection of weld, seam
|Testing as per ASTM specification & recording the result. One test for every 30 to 35 Mtrs. Visual inspection weld zone. O.D. , Thickness & Length.
Check roller surface profile& finish.
|3||Solutions Annealing (At Min. 1040 C)
With continuous water quenching.
|Automatic Relay Temp / Controller Adjusted to present level. Measurement of hardness as per Std. one Test / Lot / Heat|
|4||Straightening||Straightness OD Surface Finish||Adjust roller setting measure visual|
|5||Cutting||Square cut Length||Right angle to length, visual|
|6||Deburing||Burs removel On OD and ID Edges||Visual|
|One Test / Bath Day
One Test / Bath Day
|8||Hydrostatic Pressure Test||Test Pressure||100 % Inspection at test pressure specified as per ASTM Std.|
|9||Final Inspection||IGC Test Dimensions Surface Physical Testing
|As per standard 100 % inspection of Dimensions as specified.
Visual Inspection for surface defects, Physical Testing and Chemical analysis as per ASTM standards.
|10||Marketing||Marking as per Std.||Check for proper marking|
|11||Packing||Seaworphy Packing / Wooden Cart||Check for packing, Quantity, shipping mark,|
|Name of Machines|
Stainless Steel Pipe/ Tubes Manufacturing Technique
Production specifications: outside diameter (O.D) ￠5–￠830mm wall thickness (W.T): 0.5-60mm
Steel type: nickel-base alloy Mone1400, 800/800H, C-276, T91 and etc.
Duplex stainless steel: UNS $31803 (00Cr22Ni5Mo3N), UNS $32304 (00Cr23Ni4N), UNS $32750 (00Cr25Ni7Mo4N)
Martensite: TP410 (1Crl13), TP420 (2Crl3, 3Crl13), TP430 (1Crl17), TP405 (0Crl 3AI)
Austenite: TP310S (0Cr25Ni20, 2520 high temperature furnace tube), TP314 (1Cr25Ni20Si2), 904L (00Cr20Ni25Mo4.5Cu, UNS N08904), TP317L (00Crl 9Nil 3Mo3), TP347 (0Crl 8Nil 1Nb), TP321 (0Crl 8Nil 0Ti), TP304 (0Crl 8Ni9), TP304L (00Crl 9Nil 0), TP316 (0Cr17Ni12Mo2), TP316L (00Crl17Nil 4Mo2), TP31 6H (1Crl17Ni12Mo2), TP304H (1Cr18Ni9), C4 (00Cr14Ni14Si4) Steel for urea: TP316L (00Cr18Ni14Mo3), $31050 (00Cr25Ni22Mo2)
Standard: ASTM A31 2, ASTM A21 3, ASTM A269, ASTM A511, ASTM A790, ASTM A789, JIS G3459, JIS G3463, DIN 17456, DIN 17458 GB/T14975, GB/T14976, GB13296, GB5310, GB9948 and etc.
Stainless Steel Pipe/ Tubes Production flow
Stainless Steel Pipe/ Tubes Testing Facilities
- Corrosion Test
- Hardness Test
- Flattening Test
- Flaring Test
- Visual Inspection
- Hydro Test
- Chemical Testing
- Micro & Macro Test
- NDT (In house)
- Bending Test
- Flange Test
- PMI Machine (In house)
- Reverse Flattening Test
- Tensile Testing
- Air Under Water Test / Pneumatic Test
- Eddy-Current Testing
- Radiography Test
- Ultrasonic Testing
- Physical & Mechanical Test
- Spectrometer (In house)