Nik-San Pipefit Engineering Co.

• Low-carbon steel (up to 0.3% carbon): Offers good ductility, weldability, and toughness.
• Medium-carbon steel (0.3% to 0.6% carbon): Provides higher strength and hardness.
• High-carbon steel (0.6% to 2.0% carbon): Has excellent hardness and wear resistance, but is less ductile. 

• ASTM A106 (Grades B and C): A standard for high-temperature and high-pressure service, often used in power plants and refineries.
• ASTM A53 (Grade B): Used for general-purpose applications, including structural work and conveying water, steam, and air.
• ASTM A333 (Grade 6): Suitable for low-temperature service and cryogenic applications.
• API 5L (various grades): Designed for pipelines in the oil and gas industry. 

• High strength: Its uniform structure and material composition allow it to withstand high pressure and mechanical stress.
• Pressure and temperature resistance: The absence of a seam makes it less prone to cracking under high temperature and pressure, making it ideal for boilers and steam lines.
• Durability: Depending on the grade, it can offer high hardness and wear resistance.
• Versatility: Available in a wide range of diameters, wall thicknesses (schedules), and lengths.
• Customizable: Can be supplied with various end finishes and surface coatings, such as galvanization or epoxy, for added corrosion resistance. 

• Oil and Gas: Transporting oil, gas, and other fluids under high pressure.
• Petrochemical and Refining: Processing volatile chemicals and steam.
• Power Plants: Use in boilers, heat exchangers, and steam lines.
• Automotive: Manufacturing chassis and hydraulic systems.
• Construction: Heavy-duty structural frameworks and scaffolding.
• Mechanical Engineering: Pressure vessels and hydraulic components.

1. Billet preparation: A solid, round steel billet is inspected and cut to the correct length.
2. Heating: The billet is heated to a high temperature in a rotary furnace.
3. Piercing: A specialized tool, called a piercer or mandrel, punches through the center of the heated billet, creating a hollow shell.
4. Elongation: The hollow shell is rolled and stretched to achieve the specified diameter and wall thickness.
5. Finishing: The tube is then cooled, straightened, and subjected to final inspections and tests, such as hydrostatic and non-destructive testing, to ensure quality.
6. Cold drawing (optional): For tighter dimensional accuracy and a smoother surface finish, the tube can undergo a cold-drawing process, where it is drawn through dies at room temperature. 

• Hot-rolled: Formed at high temperatures, these are suitable for large-diameter, thick-walled pipes used in high-pressure, high-temperature environments. They are the most common and cost-effective type.
• Cold-rolled/Cold-drawn: Made by further processing hot-rolled tubes at room temperature to achieve better dimensional accuracy, a smoother surface, and enhanced mechanical properties. 

• Carbon steel: Widely used in construction and for transporting fluids like water and natural gas. Grades like 10, 20, and 45 are common.
• Alloy steel: Contains other elements like chromium and molybdenum to increase hardness, wear resistance, and strength.
• Stainless steel: Made with corrosion-resistant alloys containing chromium and nickel, making them ideal for chemical, pharmaceutical, and food-grade applications. 

• Oil and gas: Used for drilling, casing, tubing, and pipelines that transport crude oil, natural gas, and other petroleum products.
• Petrochemical and chemical industries: Employed in high-pressure piping systems, heat exchangers, and boilers.
• Power generation: Used for steam pipelines, boiler tubes, and superheater tubes in power plants.
• Mechanical and automotive engineering: Utilized in hydraulic cylinders, high-pressure braking systems, and various mechanical parts.
• Construction: Applied for structural purposes and building infrastructure.
• Aerospace: Used for components that require high strength and reliability. 

• Seamless: Produced by extruding or drawing a solid stainless steel billet over a central mandrel. It has no weld and is preferred for high-pressure and high-temperature applications where consistent structural integrity is critical.
• Welded: Created by rolling a stainless steel strip into a tube shape and welding the seam. It offers tighter dimensional tolerances and is generally more cost-effective. It is well-suited for applications where less internal pressure is required.
• ERW (Electric Resistance Welded): A type of welded tubing formed by cold-rolling a flat steel strip and using an electric current to heat and fuse the edges together.

• Construction: Continuous, seamless design with high structural integrity and low surface roughness.
• Material: Composed primarily of iron and carbon, with trace elements, offering high tensile strength (approx. 400-510  or higher).
• Standards/Grades: Commonly compliant with ASTM A106, API 5L, and DIN 2391.
• Dimensions: Available in various schedules (e.g., Sch 40, Sch 80, Sch 160) and sizes.

• Elbows: Used to change the direction of flow, typically at 45°, 90°, or 180° angles. They are available in Long Radius (LR) for smooth flow and Short Radius (SR) for compact spaces.
• Tees: Designed to branch off from a main pipeline. They include Equal Tees (same diameter on all ends) and Reducing Tees (smaller branch diameter).
• Reducers: Connect pipes of different sizes to adjust flow rates. Concentric Reducers align the ends centrally, while Eccentric Reducers have offset ends for horizontal pipelines.
• End Caps: Used to permanently seal or plug the end of a pipe.
• Crosses: Feature four openings at right angles to connect four pipes at a single junction.
• Stub Ends: Used in conjunction with lap joint flanges to allow for easy disassembly.

We are engaged in offering quality product to our clients. Our range of all products is widely appreciated by our clients.

• Material: Carbon Steel (CS)
• Grade: A106 Grade B (most common in the A106 series)
• Manufacturing Process: Seamless (SMLS)
• Standard: ASTM A106 / ASME SA106
• Chemical Composition: Carbon: , Manganese: , Phosphorus: , Sulfur: , Silicon: min 
• Mechanical Properties: Tensile Strength:  (), Yield Strength:  ()
• Common Sizes:  to , and up
• Schedules: SCH 20, SCH 40, SCH 80, SCH 160, STD, XS, XXS

PIPES & TUBES:

Types: Seamless & Welded.

Sizes: 1/2"NB TO 32" NB. (Seamless) & 1/2"NB TO 48"NB. (ERW/Spiral) in Sch 10 to Sch XXS.

Material: Stainless Steel, Carbon Steel, Low Temperature Carbon Steel, Alloy Steel, Steam Boiler Quality, Plus "Exotic" Materials I.E Various Grades Nickel, Monel, Incoloy, Hastealloy, Inconel, Cupronickel & Titanium.

Standard : ASTM A106 / ASME SA106
Size : NPS ¼” to 30” diameter
Type : Seamless/ Welded / ERW
Schedule : SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
Packing : In bundles, Anticorrosion heat preservation, Varnish coating, Ends can be bevelled or square cut, End Capped Certification & supplementary test, Finishing & Identity Mark
Surface Protection : Black (Self Coloured uncoated), Varnish/Oil Coating, Pre-Galvanized, Hot Dip Galvanized
End : Plain End, Beveled End, Screwed, Treaded
Length : Single Random, Double Random & Required Length, Custom Size – 12 Meter lengths

Standard : ASTM A106 / ASME SA106
Size : NPS ¼” to 30” diameter
Type : Seamless/ Welded / ERW
Schedule : SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
Packing : In bundles, Anticorrosion heat preservation, Varnish coating, Ends can be bevelled or square cut, End Capped Certification & supplementary test, Finishing & Identity Mark
Surface Protection : Black (Self Coloured uncoated), Varnish/Oil Coating, Pre-Galvanized, Hot Dip Galvanized
End : Plain End, Beveled End, Screwed, Treaded
Length : Single Random, Double Random & Required Length, Custom Size – 12 Meter lengths