www.nipponsteel.com HF-ERW Pipes & Tubes 2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 Japan Tel: +81-3-6867-4111 HF-ERW P102en_01_201904f 2019
Characteristics 1 Superior Material NIPPON STEEL production system begins with advanced metallurgy and clean BOF steelmaking practices. After continuous casting, at hot-rolling process, hot-rolled strip of optimum quality for pipe making is produced. 2 High Dimensional Accuracy High uniform wall thickness and smooth finish free from nonmetallic inclusions and surface defects provide Linepipe with a superior level of quality and excellent dimensional accuracy as well as high performance properties. 3 Variety of Products 1 High strength linepipe 2 High toughness linepipe 3 Anti Sour linepipe 4 OCTG pipe 4 High Reliability of Weld The unique welding condition control and monitoring system ensures quality of the weld along its entire length. Notice: While every effort has been made to ensure the accuracy of the information contained within this publication, the use of the information is at the reader s risk and no warranty is implied or expressed by NIPPON STEEL CORPORATION with respect to the use of the information contained herein. The information in this publication is subject to change or modification without notice. Please contact the NIPPON STEEL CORPORATION office for the latest information. Please refrain from unauthorized reproduction or copying of the contents of this publication. The names of our products and services shown in this publication are trademarks or registered trademarks of NIPPON STEEL CORPORATION, affiliated companies, or third parties granting rights to or affiliated companies. Other product or service names shown may be trademarks or registered trademarks of their respective owners. 5 Excellent Quality From steelmaking to pipe manufacture, quality is strictly controlled through every production step to ensure pipe products. Testing and inspection include body lamination UST, highly sensitive UST for weld seam, hydrostatic testing and numerous mechanical tests. 1
24-inch Mill Manufacturing Process Blast Furnace Basic Oxygen Furnace Degassing Continuous Casting Slab Hot Strip Mill Uncoiling, Leveling, Shearing Edge Milling Coil Edge UST Forming PWP HF-Welder Outside and Inside Weld Bead Removing Seam Heat Treatment Sizing Pipe Body Cutting UST Facing Flattening Test Hydrostatic Test Seam UST Final Inspection Marking Products Drift Test and Inspection Products Threading and Beveling Coupling Power Tightening 2 3
16-inch Mill Manufacturing Process Blast Furnace Basic Oxygen Furnace Degassing Continuous Casting Hot Strip Mill Slitting Uncoiling Leveling Shearing and Welding Looper Edge Milling Coil Edge UST X-Ray Gauge Forming PWP HF-Welder Outside and Inside Weld Bead Removing Seam Heat Treatment Cooling Sizing Straightening Cutting Hydrostatic Test Straightness Inspection Pipe End UST and Wall Thickness Inspection Outside Diameter and Roundness Inspection Pipe Body UST Seam UST Facing Products Flattening Test Inspection Weighing Length Measuring Marking UV Coating Hydrostatic Test and Drift Test Products Threading Coupling Screw-on and Power Tightening 4 5
Principal Processes HF ERW Weld Heat Input Control 1 Welding Phenomena Steelmaking PWP HF Welder Degassing and desulphurizing during steelmaking process supply clean steel with low non-metallic inclusions. Perfect Welding Process, developed by NIPPON STEEL, produces high-quality weld. A welded seam is inspected by ultrasonic tester. Varying combinations of welding heat input, welding speed, pipe wall thickness, etc. produce different weld results. Low Heat Input Optimum Heat Input High Heat Input Hot Rolling Welded Seam Heat Treatment Advanced hot rolling supplies hot coils with fine grain structure and high dimensional accuracy. Seam heat treatment homogenizes microstructure and physical properties at welded zone as same as those of base metal. Exact seam position is indicated by fluorescent marker for weld seam tracking. Classification of Welding Phenomena Fluctuation Patterns of Oscillation 2 Weld Heat Input Control Welding conditions are monitored and controlled within the optimum range by using our unique weld heat input system to minimize oxides included in the weld seam. 6 7
Reliable NDT System Size Range of ERW Pipe 1 Coil Edge UST After coil edge preparation, both edges of the coil are inspected for laminar imperfection with coil edge UST. (If required) Probe Arrangement Skelp Water Nozzle B A NIPPON STEEL s ERW pipe mills produce pipe with outside diameters from 4-1/2 inches (114.3 mm) to 24 inches (609.6 mm). The equipment to produce such pipes reflects NIPPON STEEL s intent to meet the great demand for larger and heavier steel pipe. Wall Thickness To produce pipe with wall thickness up to 0.866 inches (22 mm) NIPPON STEEL has installed large scale forming & welding equipment. in mm 22 Length NIPPON STEEL s ERW mills can produce pipes with length up to 60 feet (18.3 m). These long pipes reduce the number of weld joints and inspections necessary at the site, thus leading to faster construction and lower costs. 0.8 20 2 Full Body UST 3 Weld Seam UST Full body is inspected by a rotary UST unit along full length of welded pipe. (If required) D Probe Arrangement C B B C D A B Each pipe is inspected for weld seam imperfection with advanced automated UST for entire wall thickness. Probe Arrangement (example) n 3 2 1 Weld Seam 1 2 3 n Wall thickness 0.7 0.6 0.5 0.4 0.3 0.2 0.1 18 16 14 12 10 8 6 4 2 0 Nagoya Works Oita Works (Hikari ) 4 6 8 10 12 14 16 18 20 22 24 in A 114.3 168.3 219.1 273.1 323.9 355.6 406.4 457.2 508 558.8 609.6 mm Outside diameter Seam UST 8 9
FACILITIES AND LOCATIONS MEMO UO Pipe Mill ERW Pipe Mill Seamless Pipe Mill Research Center Tokyo Head office Amagasaki Hikari Nagoya Wakayama Kashima Hasaki Kimitsu Futtsu 10 11
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