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炭素鋼管の分類

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The material, diameter, wall thickness, and quality of a specific service determine the pipe manufacturing process. Carbon steel piping is classified according to the manufacturing methods as follows: Seamless Electric resistance weld (ERW) Spiral-submerged arc weld (SAW) Double submerged arc weld (DSAW) Furnace weld, butt-welded, or continuous weld Seamless Steel Pipe Seamless pipe is formed by piercing a solid, near-molten steel rod, called a billet, with a mandrel to produce a pipe without seams or joints. The figure below depicts the manufacturing process of seamless pipe. ERW Steel Pipe ERW pipe is made from coils that are cupped longitudinally by forming rolls and a thin-pass section of rolls that brings […]

熱間圧延と冷間圧延/引抜シームレス鋼管

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Introduction In industries like oil and gas, petrochemicals, offshore engineering, and machinery manufacturing, the choice between hot-rolled seamless steel pipe and cold-rolled/drawn seamless steel pipe plays a critical role in determining the performance, durability, and cost-efficiency of equipment and projects. With demanding requirements for dimensional accuracy, mechanical properties, and durability, choosing the right pipe type that suits specific applications and environmental challenges is essential. This guide will provide an in-depth comparison of hot-rolled seamless steel pipes and cold-rolled/drawn seamless steel pipes, highlighting the manufacturing processes, mechanical properties, and typical use cases for each. The goal is to help you make informed decisions that meet your project’s needs. Understanding Seamless Steel […]

3LPEコーティングラインパイプのご紹介

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Introduction The base materials of 3LPE Coated Line Pipe include seamless steel pipes, spiral welded steel pipes, and straight seam welded steel pipes. Three-layer polyethylene (3LPE) anti-corrosion coatings are widely used in the oil pipeline industry for their good corrosion resistance, water vapor permeability resistance, and mechanical properties. 3LPE anti-corrosion coatings are crucial to the service life of buried pipelines. Some pipelines of the same material are buried underground for decades without corrosion, while others leak in a few years. The reason is that they use different coatings. Structure of 3LPE Coated Line Pipe 3PE anti-corrosion coatings generally consist of three layers: the first layer is epoxy powder (FBE) >100um, […]

PAPA石油貯蔵タンクプロジェクト

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PAPA Petroleum Oil Storage Tank Project Project: Oil Storage Tanks Location: Cambodia Duration: November 2017 – May 2018 Required Product: Steel Pipes, Pipe Fittings, Pipe Flanges, Steel Plate Specifications: API 5L Gr.B, ASTM A106 Gr.B, ASME B16.9, ASME B16.5, ASTM A36 Quantity: 800 Tons Plates, 1050 Tons Steel Pipes, 6330 Pieces Pipe Fittings and Flanges, Bolt & Nuts Use: Tank Farm Oil Pipeline System and Submarine Pipeline Coatings Specifications: Epoxy zinc-rich primer Coating, DIN 30670-2012 3LPE Coating Use: Prevention of sea salt corrosion and lifespan extension

ペトロエクアドル燃料油ターミナルプロジェクト

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PetroEcuador Fuel Oil Terminal Project Project: Troncal Terminal Location: Ecuador Duration: July 2017 – April 2020 Required Product: Steel Pipes, Pipe Fittings, Pipe Flanges Specifications: API 5L/A53/A106 Gr.B; ASTM A234 WPB ASME B16.9; ASTM A36; ASTM A105/105N ASME B16.5; ASTM A193 Gr.B7 & ASTM A194 Gr.2H Quantity: 2031 Tons of Steel Pipes; 320 Tons of Steel Plates; 30556 Pieces of Pipe Fittings and Flanges, Valves, Stud Bolts & Hexagonal Nuts Use: Store Fuel Oil Coatings Specifications: Zinc-rich Epoxy Primer Coating, Brand: Hempel Use: Prevention of seawater and sea salt corrosion and lifespan extension