Welded Pipes & Tubes
Kaizen Steel Industries provides a wide range of welded pipes to clients around the world, including options like super duplex welded piping, nickel alloy, and 6% moly. We ensure that the welded pipes from our trusted mills and manufacturers meet high quality standards and are fully tested to international norms.
Although welded pipes are generally considered weaker than seamless pipes due to their seam, modern manufacturing techniques and quality control procedures have greatly improved. As long as the welded pipe’s temperature and pressure limits are not exceeded, it can perform effectively in many applications.
Welded pipes are a suitable choice for industries such as petrochemical, desalination, oil & gas, and chemical processing.
Welded pipes come in three types: welded on the outside, welded on the inside, or welded on both sides. Regardless of the type, all welded pipes have a seam. As a leading supplier of stainless steel and alloy welded pipes, we offer:
- Welded Duplex Pipe
- Welded Super Duplex Pipe
- Welded Stainless Steel Pipe
- Welded Nickel Alloy Pipe
Manufacturing Welded Pipes
Welded pipe manufacturing has significantly advanced in recent years. The ability to weld different types of steel varies:
- Austenitic Steels: These are generally the easiest to weld.
- Ferritic Steels: These can be welded in thin sections.
- Duplex Steels: These are now considered weldable but require more care than austenitic steels.
The manufacturing process for welded pipes begins with rolling a steel coil to the desired thickness, creating a flat strip or plate. This strip is then rolled into a tube, and the seam is welded. There are two main welding methods:
Electric Resistance Welding (ERW):
In the ERW process, a flat steel sheet is cold-formed into a cylindrical shape. An electrical current is passed through the edges of the cylinder, heating them until they bond together. This method does not require welding filler material.
Submerged Arc Welding (SAW):
The SAW process is used for thicker steel sheets or long welds. It involves creating an arc between a continuously fed electrode and the workpiece. A flux covers the arc, generating protective gases and slag, and adding alloying elements to the weld. The arc is covered by the flux layer, which makes it invisible during welding and minimizes heat loss.
Welded Pipes Finishing
Welded pipes can be finished in various ways based on customer needs and their intended use. Common finishes include:
- Threaded and Coupled Ends: For different diameter lines.
- Threaded End Without Coupling: Suitable for various applications.
- Plain End or Cut Square: For general purposes.
- Pre-Grooved or Bevelled Ends: Ideal for structural applications.
To enhance corrosion protection, metallic coatings like galvanizing, aluminizing, and cladding can be applied. For storage and transport protection, non-metallic coatings such as oil, paint, plastic coating, or coal tar may be used.
Additionally, welded pipes can undergo a process called “pickling and passivation,” where the pipe is dipped in acid to remove the outer layer of metal and then rinsed in water. This process creates a smoother surface that helps reduce corrosion.
Specifications of Welded Pipes
Product | Spiral Welded Steel Pipes |
Materials | Carbon Steel, Alloy Steel, Mild Steel
|
Outer Diameter | 14″ to 100″ |
Wall Thickness | 5.0mm to 25mm |
Length | Random Length, Fixed Length 6 MTRS, 11.8 to 12 MTRS |
Finish | Mill Finish, without Coating |
Packing | Open Pipes on Trailers for Delivery Across India |
Testing & Inspection | Chemical Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test) |
Test Certificates | As per EN 10204 3.1B |
Welded Pipes Material & Grades
Category | Details |
---|---|
Inconel series | Inconel 600, Inconel 601, Inconel 617, Inconel 625, Inconel 690, Inconel 718, Inconel X-750 |
Incoloy series | Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 801, Incoloy 825, Incoloy 901, Incoloy 907, Incoloy 925, Incoloy 926, Incoloy 25-6Mo, Incoloy A-286 |
Hastelloy series | Hastelloy B, Hastelloy B-2, Hastelloy B-3, Hastelloy C, Hastelloy C-4, Hastelloy C-22, Hastelloy C-276, Hastelloy C-2000, Hastelloy G-3, Hastelloy G30, Hastelloy X, Hastelloy HX |
Monel series | Monel 400 (UNS N04400, WNr. 2.4360), Monel K500 (UNS N05500) |
Welded Pipes Applications
Welded pipes are versatile and used in a wide range of industries and applications. Here are some common uses:
- Oil and Gas: For transporting oil, gas, and other fluids.
- Water Supply: In municipal water systems and irrigation.
- Construction: For structural support and frameworks.
- Chemical Processing: To handle chemicals and other industrial fluids.
- Power Generation: In power plants for steam and cooling systems.
- Automotive: In vehicles for exhaust systems and other components.
- Petrochemical: For various applications in petrochemical plants.
Food and Beverage: In processing and transporting food and drink products.
Kaizen Steel Industries Export to
Burundi, Comoros, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Malawi, Mauritius, Mayotte, Mozambique, Reunion, Rwanda, Seychelles, Somalia, Tanzania, United Republic of Uganda, Zambia, Zimbabwe, Angola, Cameroon, Central African Republic, Chad, Congo (Brazzaville), Congo, Democratic Republic of the Equatorial Guinea, Gabon, Sao Tome and Principe, Algeria, Egypt, Libyan Arab Jamahiriya, Morroco, South Sudan, Sudan, Tunisia, Western Sahara, Botswana, Lesotho, Namibia, South Africa, Swaziland, Benin, Burkina Faso, Cape Verde, Cote d\\’Ivoire (Ivory Coast), Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Mauritania, Niger, Nigeria, Saint Helena, Senegal, Sierra Leone, Togo
Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Bonaire, Saint Eustatius and Saba, British Virgin Islands, Cayman Islands, Cuba, Curaçao, Dominica, Dominican Republic, Grenada, Guadeloupe, Haiti, Jamaica, Martinique, Monserrat, Puerto Rico, Saint-Barthélemy, St. Kitts and Nevis, Saint Lucia, Saint Martin, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, Turks and Caicos Islands, Virgin Islands (US), Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands (Malvinas), French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela, Bermuda, Canada, Greenland, Saint Pierre and Miquelon, United States
Afghanistan, Armenia, Azerbaijan, Bangladesh, Bhutan, Brunei Darussalam, Cambodia, China, Georgia, Hong Kong, India, Indonesia, Japan, Kazakhstan, South Korea, Kyrgyzstan, Laos, Macao, Malaysia, Maldives, Mongolia, Myanmar (ex-Burma), Nepal, Phillipines, Singapore, Sri Lanka (ex-Ceilan), Taiwan, Tajikistan, Thailand, Timor Leste (West), Turkmenistan, Uzbekistan, Vietnam
Albania, Andorra, Belarus, Bosnia, Croatia, European Union, Faroe Islands, Gibraltar, Guerney and Alderney, Iceland, Jersey, Kosovo, Liechtenstein, Macedonia, Man, Island of Moldova, Monaco, Montenegro, Norway, Russia, San Marino, Serbia, Svalbard and Jan Mayen Islands, Switzerland, Turkey, Ukraine, Vatican City State (Holy See)
Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom
Bahrain, Iraq, Iran, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, United Arab Emirates, Yemen