From the heart of Hamilton, New Zealand, Latham Steel proudly stands as a trusted manufacturer and supplier of high-calibre pipeline solutions. Our commitment to local industry and global standards is perfectly embodied in our API 5L Grade L390 pipe. We provide a robust and reliable product for demanding energy and resource projects, ensuring strength and integrity where it matters most, backed by the dedication and expertise of our New Zealand team. This pipe is engineered to meet the rigorous challenges faced by modern infrastructure.
The composition of API 5L Grade L390 is a careful balance, primarily featuring carbon manganese steel with controlled levels of micro-alloying elements. This specific formulation is what gives the pipe its notable mechanical strength. It is engineered to deliver a specified minimum yield strength of 390 MPa, offering an excellent combination of high tensile strength, toughness, and durability. This reliable performance profile makes it suitable for handling substantial pressure and stress in critical applications.
| Specification | API 5L / ISO 3183 Hot Rolled . |
| API 5L Grade L390 Pipe Type | Seamless |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Outer Diameter Size | 3/8″ NB To 30″ NB (Nominal Bore Size) |
| Wall Thickness | Schedule 20 To Schedule XXS (Heavier On Request) Up to 250 mm Thickness |
| Length | 5 To 7 Meters, 09 To 13 Meters, Single Random Length, Double Random Length And Customize Size. |
| Pipe Ends | Plain Ends / Beveled Ends / Coupling |
| Surface Coating | Epoxy Coating / Colour Paint Coating / 3LPE Coating. |
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
|---|---|---|---|---|---|---|---|---|---|
| max 0.28 | – | max 1.40 | 0.03 | 0.03 | – | – | – | – | Nb+Ti+V max 0.15 |
| Yield Strength | Tensile Strength | Elongation A5 min | |||
|---|---|---|---|---|---|
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 490 | – | 71 | – | ||
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Latham Steel is a top manufacturer and supplier of high-quality API 5L Grade L390 Pipe products in Hamilton, New Zealand. Specializing in steel solutions, we provide a wide range of products, including Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel. Our offerings include Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates. Known for our reliable delivery and superior customer service, we are committed to offering top-tier steel materials that ensure durability and performance across a wide range of industrial applications. We strive to meet the highest standards, making us a trusted partner for all your steel needs.
When your project involves the safe and efficient transport of oil or natural gas over long distances, API 5L Grade L390 pipe is a fundamental component. Its high-pressure capability makes it the go-to choice for constructing major transmission pipelines, both onshore and offshore. Beyond the energy sector, it’s also widely used in pivotal infrastructure like piling, structural piling, and slurry transport systems, where its resilience against demanding mechanical and environmental conditions provides essential long-term reliability and safety for communities and industry alike.
Latham Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hamilton, New Zealand.
Copyright 2025 Latham Steel. All rights reserved
