Stainless Steel High Pressure Pipes and Tubes, Suppliers, Manufacturers  – ASTM A213, ASTM A312, ASTM A269, ASTM A778, ASTM A789 High Pressure Pipe

• We specialize in manufacturing stainless steel high pressure pipe/tubes in straight lengths of up to 30 meters, or as U-bends in a size range of 3/16” (4.76 mm) to 4” (101.6 mm) in wall thickness upto 15mm. We can produce seamless and welded stainless steel high pressure pipe/tubes in a wide range of grades and sizes. Our manufacturing range for stainless steel high pressure pipe/tubes include pipe/tubes produced from stainless steel –  304/304H, 309S/309H, 321/321H,  316/316H, 347/347H.
• Boilers that operate higher than 15 psig are called “high-pressure” boilers. High-pressure tubes are characterized by high yield strength and high tensile strength in combination with high elongation. The pressure resistance is guaranteed by the very smooth inside surface. An autofrettage treatment prolongs the cycle fatigue behavior. Seamless high-pressure tubes for a variety of high-pressure applications using liquid or gas as the pressure medium, such as hydraulic installations, test benches and water-jet cutting equipment. All our tubes are 100% quality tested, which include chemical testing, mechanical testing as well as hydro testing. All stainless steel high pressure pipes are heat treated, solution annealed, and pass hydrostatic test and ultrasonic test.
• Stainless steel high pressure tubes are used to produce seamless tubing for water boilers and superheaters, boiler drums, collectors, pumps and pressure vessels for elevated pressure service, and steam turbine heavy shafts with diameter exceeding 2 meters and weighing more than 100 mt.
• Applications of stainless steel high pressure pipe/tubes: – A stainless steel high pressure pipe/tube is a device used to transfer heat between two or more fluids. Power generation and petrochemical plants, which use all product forms. Steam turbines require large forgings and castings, whereas pressure vessels, boilers and piping systems require tubes, pipes, plates and fittings. In addition to high creep strength, other material properties like hardenability, corrosion resistance, and weldability are also important. The relative importance of these properties depends on the specific application. For example, large turbine rotors require steels with good hardenability, whereas power plant tubing and piping must have good weldability. Even so, the alloys used in these different applications employ the same mechanisms to improve creep strength. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a high pressure is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive high pressure that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.
• We are manufacturing seamless and welded stainless steel high pressure tubes by following a stringent quality control program and standards which assure good surface and close dimensional tolerances. We are a global industry leading provider of carbon steel tube, alloy steel tube and stainless steel high pressure tube solutions and have obtained ASME Quality and ISO 9001:2015 Certifications. In addition to being a world class tubing manufacturer, we are an authorized dealer of ISMT and Jindal for stock and supply of carbon steel and alloy steel tubes.
• All our stainless steel high pressure tube products are supplied with 3.1 specific test certificates, according to EN 10204. Certification according to 3.2 can be agreed at the time of ordering. Metallica makes it easy for you to source top quality stainless steel high pressure tubes at the lowest prices.
• We specialize in providing deliveries to your factory directly from our warehouse or our principal suppliers. For immediate deliveries of tubes, our inventory is stocked in around 5 warehouses in Kalamboli and 3 warehouses in Mumbai. With a team of over 50 people dedicated for deliveries and response to our esteemed customers, we can offer the best service. At the same time, we are also committed to offer best quality products and most competitive prices to our customers.

Manufacturing Process for Stainless Steel High Pressure Pipe/Tubes

The stainless steel high pressure pipe/tubes are manufactured by piercing process followed by pilgering/drawing. Our facilities are equipped with all the machines required to cover the process with a high quality results (piercing, pilger machines, draw benches, straightening machine, degreasing facility and solution annealing furnace).

All seamless stainless steel high pressure pipe/tubes are manufactured by cold drawing and cold rolling process followed by annealing, straightening and testing. The tolerance of tubes produced by us in line with ASME/ASTM & EN Standards. We promise each stainless steel high pressure pipe/tube that we deliver to our client will be the best in quality. All shipments include a full Test Certificate showing all required test results and verifying compliance with the order requirements.

1. Cold Rolling – Tube rolling uses compression to reduce the size of seamless stainless steel high pressure pipe/tubes. It utilizes one or two sets of rolls with constant cross-section grooves on the circumference of the tube. The rolls are driven by rack and pinion gears of different radii along profiled cams, completing multiple 360º rotations around the tube. Tube rolling is a very precise method of reducing very thin walled and/or smaller diameter tubes, and is often used as the final cold working step. By rolling, we’re able to achieve exceptional control over dimensional tolerances and surface finish while also minimizing material loss and improving the metal’s microstructure.
2. Cold Drawing – Cold drawing reduces the diameter by pulling the tube through a die that is smaller than the tube. In order to fit the tube into the die, one end is swaged thereby reducing the diameter of the leading end before drawing. Next, the narrowed end is passed through the die and clamped to a drawing trolley which pulls the tube through the die.
3. Annealing – Annealing is used to soften the metal before further cold working or fabrication processes, and improves the overall metallurgical microstructure of the tube. During tube reduction or cold drawing, it can become hard and somewhat brittle. To be able to draw the tube again, stresses formed during cold working need to be removed to return the material to its normal state. During annealing the tube is heated to a controlled pressure and soak time. Through this process the tube remains in shape, but the grains in the structure of the tube reform into a regular unstressed pattern. The resulting annealed tube is softer and suitable for redrawing
4. Straightening – Drawing and annealing generally results in some degree of bowing, producing a slight bend in the tubing. In order to make the tubes straight, we use multiple roll mechanical straighteners to implement this procedure, Straightening can introduce slight changes to the size and mechanical properties of the tubing, so these aspects are very carefully controlled during the process.
5. Inspection and Tests – At each manufacturing stage, stainless steel high pressure pipe/tubes are submitted to a visual and dimensional inspection. They are also submitted to Eddy current test (straight tubes) or, if requested, to other non destructive tests in accordance with the requirements of the standards. Mechanical tests, along with flaring and flattening tests, are performed on samples of each order as per the reference standards. We inspect all lots of stainless steel high pressure tubing before shipment to ensure that every aspect of the customer’s order has been met. Our in-house inspection and tests capabilities include:

• • Chemical Composition Test
  • Visual inspection
  • Dimensional inspection
  • Surface roughness testing
  • Eddy Current testing
  • Hydrostatic pressure testing
  • Destructive mechanical testing:
    • Yield Strength
    • Tensile Strength
    • Elongation
    • Hardness testing
    • Bending, flattening, and flaring

Stainless Steel High Pressure Pipe/Tube Specifications, Stock & Production Range

• Email Us on info@metallicametals.com for best prices on various types of Stainless Steel High Pressure Pipe/Tube, Duplex High Pressure Pipe/Tube, Super Duplex High Pressure Pipe/Tube, 321H High Pressure Pipe
• Marking: Heat Number, Size, Grade, Manufacturing Spec., Commodity Name or as per customer request

Chemical Composition of Stainless Steel High Pressure Pipe

Impact of Various Alloying Elements on Stainless Steel

Maximum Optimum Temperatures of Stainless Steel Grades

Stainless steels have good strength and good resistance to corrosion and oxidation at elevated temperatures. Stainless steels are used at temperatures up to 1700° F for 304 and 316 and up to 2000 F for the high temperature stainless grade 309(S) and up to 2100° F for 310(S).

[Image Source: From Web]