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Everything You Need to Know About Welded & Seamless Pipes

everything-you-need-to-know-about-welded-and-seamless-pipes

Everything You Need to Know About Welded & Seamless Pipes

Introduction

Pipes are the unsung heroes of modern infrastructure. Whether it’s delivering water to your home, transporting oil and gas across continents, or handling chemicals in industrial plants, pipes are everywhere. And when it comes to choosing the right type, two names dominate the conversation welded pipes and seamless pipes.

If you’re an engineer designing a chemical plant, a procurement manager sourcing materials, or a construction company building pipelines, understanding the differences between these two types of pipes can save you time, money, and a lot of headaches.

In this guide, we’ll break it all down for you what they are, how they’re made, their pros and cons, and how to pick the right one for your project.

What Are Welded Pipes?

Welded pipes are made by rolling a flat sheet of metal into a tube and welding the edges together.

How they’re made:

  • Forming: A flat sheet of stainless or carbon steel is rolled into a tube shape.
  • Welding: The edges are joined using techniques like Electric Resistance Welding (ERW) or High Frequency Induction Welding (HFI).
  • Finishing: The pipe is heat treated, cleaned, and inspected for quality.

Why choose welded pipes?

  • Cost effective: They’re more affordable than seamless pipes, especially for larger diameters.
  • Quick production: Shorter lead times mean faster delivery.
  • Customizable: Available in a variety of lengths and thicknesses.

Common uses: Water supply systems, structural applications, fencing, and chemical transport lines.

What Are Seamless Pipes?

Seamless pipes are made from a solid piece of steel that’s heated and pierced to create a hollow tube no welding required.

How they’re made:

  • Billet Preparation: High quality steel billets are selected.
  • Piercing: A rotary piercer creates a hollow center.
  • Rolling & Stretching: The hollow billet is stretched and rolled to the desired size.

Why choose seamless pipes?

  • Stronger: No welded seam means uniform strength all around
  • High performance: Perfect for high pressure and high-temperature applications.
  • Precision: Superior dimensional accuracy and a smooth finish.

Common uses: Oil and gas pipelines, power generation boilers, aerospace, and chemical processing.

Welded vs Seamless Pipes. The Key Differences

Feature Welded Pipes Seamless Pipes
Manufacturing Rolled and welded from sheets/plates Extruded from a solid billet
Strength Slightly weaker at the weld seam Uniform strength all around
Pressure Resistance Lower compared to seamless Higher ideal for extreme conditions
Cost More affordable More expensive
Sizes Large diameters easily available Limited diameters but high precision

Materials Used in Welded & Seamless Pipes

We provide welded and seamless pipes in materials like stainless steel, duplex, super duplex, nickel alloys, and carbon or alloy steel, catering to diverse industrial needs.

We offer both welded and seamless pipes in a variety of materials, including:

  • Stainless Steel (SS 304, SS 316, SS 321, etc.): Corrosion resistant and ideal for chemical and food industries.
  • Duplex & Super Duplex Stainless Steel: High strength and resistance in harsh environments.
  • Nickel Alloys: Perfect for high temperature and aggressive chemical exposure.
  • Carbon Steel & Alloy Steel: An economical choice for structural and industrial applications.

Global Standards & Certifications

Our pipes comply with global standards like ASTM, ASME, DIN, EN, and ISO, ensuring reliable performance worldwide.

Our pipes meet international standards, ensuring reliability no matter where your project is:

  • ASTM: (American Society for Testing and Materials)
  • ASME: (American Society of Mechanical Engineers)
  • DIN: (German Institute for Standardization)
  • EN: (European Standards)
  • ISO: (International Organization for Standardization)

Choosing the Right Pipe for Your Project

Choose pipes based on your needs: seamless for high pressure, stainless steel for corrosion, welded for lower cost and faster delivery.

Here’s a quick guide to help you decide:

  • Operating Pressure: Go for seamless pipes if you’re dealing with high pressure steam boilers.
  • Corrosion Exposure: Stainless steel is your best bet for harsh environments.
  • Budget: Welded pipes are more cost efficient for non-critical, large-diameter applications.
  • Delivery Time: Welded pipes are quicker to produce and deliver.

Why Choose Moksh Tubes & Fittings LLP?

We’re a trusted global supplier, delivering to over 30 countries across Asia, Europe, the Middle East, Africa, and the Americas.

Why work with us?

  • A wide range of products in multiple materials.
  • Strict quality inspections at every stage.
  • Global logistics for on time delivery.
  • Customized solutions tailored to your project needs.

FAQ's

Which is stronger welded or seamless pipes?

Seamless pipes are stronger because they don’t have a welded seam, making them ideal for high pressure and high temperature applications.

Are welded pipes suitable for industrial projects?

Absolutely! For non critical applications and larger diameters, welded pipes are cost effective and reliable.

Can you supply pipes with international certifications?

Yes, all our products comply with ASTM, ASME, DIN, EN, and ISO standards.

Do you offer both stainless steel and carbon steel pipes?

Yes, we supply stainless steel, carbon steel, alloy steel, duplex, super duplex, and nickel alloy pipes.

Do you export worldwide?

Yes, we deliver to over 30 countries globally.

Final Thoughts

Welded and seamless pipes each have their strengths. The key is to choose the right type based on your project’s operating conditions, budget, and timelines. With Moksh Tubes & Fittings LLP, you get high quality products, global delivery, and peace of mind.

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Office Address: 92E, Plot No. 3, New Tank Bunder, Darukhana, Mumbai, Maharashtra- 400 010.

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