Pipes& Tubes

2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 JapanTel: +81-3-6867-4111

HF-ERWP102en_01_201904p

© 2019 NIPPON STEEL CORPORATION

HF-ERWwww.nipponsteel.com Pipes

& Tubes

2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 JapanTel: +81-3-6867-4111

HF-ERWP102en_01_201904f

© 2019 NIPPON STEEL CORPORATION

HF-ERWwww.nipponsteel.com

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 NIPPON STEEL CORPORATION or affiliated companies. Other product or service names shown may be trademarks or registered trademarks of their respective owners.

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.

1 Superior Material

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.

2 High Dimensional Accuracy

1 High strength linepipe2 High toughness linepipe3 Anti–Sour linepipe4 OCTG pipe

3 Variety of Products

The unique welding condition control and monitoring system ensures quality of the weld along its entire length.

4 High Reliability of Weld

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.

5 Excellent Quality

Characteristics

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NIPPON STEEL CORPORATION

Blast Furnace

BasicOxygenFurnace

DegassingContinuous Casting

PWPHF-Welder

Forming

Facing FlatteningTest

SlabHot Strip Mill Uncoiling, Leveling, Shearing Edge

MillingCoil Edge

UST

Outside and InsideWeld Bead Removing

Seam Heat Treatment Sizing CuttingPipe BodyUST

Hydrostatic Test Seam UST Final Inspection Products

Products

Drift Testand

Inspection

Threading and Beveling Coupling Power Tightening

Marking

24-inch Mill Manufacturing Process

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NIPPON STEEL CORPORATION

PWPHF-Welder

Outside and InsideWeld Bead Removing

Forming

FlatteningTest

Hydrostatic Test

Inspection

Sizing

Coupling Screw-onand Power Tightening

CuttingSeamHeat Treatment

Cooling Straightening

WeighingLength Measuring

Marking UV Coating

Threading

HydrostaticTest andDrift Test

Seam UST

Products

Products

Blast Furnace

BasicOxygenFurnace

Degassing

Continuous Casting

Hot Strip Mill UncoilingLeveling

Slitting EdgeMilling

Shearing andWelding

Looper X-RayGauge

FacingPipe Body USTPipe End UST andWall Thickness Inspection

StraightnessInspection

Coil EdgeUST

O u t s i d e Diameter andRoundness Inspection

16-inch Mill Manufacturing Process

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NIPPON STEEL CORPORATION

Principal Processes HF–ERW Weld Heat Input Control

Steelmaking PWP HF–WelderDegassing and desulphurizing during steelmaking process supply clean steel with low non-metallic inclusions.

Hot Rolling Welded Seam Heat TreatmentAdvanced 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.

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

Classification of Welding Phenomena Fluctuation Patterns of Oscillation

1 Welding Phenomena

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.

2 Weld Heat Input Control

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NIPPON STEEL CORPORATION

Reliable NDT System Size Range of ERW Pipe

After coil edge preparation, both edges of the coil are inspected for laminar imperfection with coil edge UST.(If required)

Full body is inspected by a rotary UST unit along full length of welded pipe. (If required)

Each pipe is inspected for weld seam imperfection with advanced automated UST for entire wall thickness.

1 Coil Edge UST

2 Full Body UST 3 Weld Seam UST

Probe Arrangement

Skelp

ABWater Nozzle

Probe Arrangement

A

C

BDB C D A B

2

0

0.1

4 6 8 10 12 14 16 18 20 22 24（in）

114.3 168.3 219.1 273.1 323.9 355.6 406.4 457.2 508 558.8 609.6（mm）

Outside diameter

Wal

l thi

ckne

ss

4

6

8

10

12

14

16

18

20

22（mm）

0.8

（in）

0.7

0.6

0.5

0.4

0.3

0.2

Oita Works(Hikari )

Nagoya Works

1 12 23

n

3n

Probe Arrangement (example)

Weld Seam

Seam UST

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 ThicknessTo produce pipe with wall thickness up to 0.866 inches (22 mm) NIPPON STEEL has installed large scale forming & welding equipment.

LengthNIPPON 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.

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NIPPON STEEL CORPORATION

KashimaHasaki

Nagoya

Amagasaki

FuttsuKimitsu

Wakayama

Tokyo

Head office

Hikari

UO Pipe MillERW Pipe MillSeamless Pipe MillResearch Center

FACILITIES AND LOCATIONS MEMO

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NIPPON STEEL CORPORATION

MEMO

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NIPPON STEEL CORPORATION