roughness stainless steel pipe


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Mechanical Properties

Ventilation Ducts - Roughness & Surface Coefficients

Surface coefficients to calculate friction and major pressure loss in ventilation ducts - concrete, galvanized steel, corroded steel and more Sponsored Links For turbulent flow the friction coefficient depends on the Reynolds Number and the roughness of the duct or pipe wall.

Absolute Pipe Roughness - EnggCyclopedia

'Absolute Pipe Roughness' (ε) is a measure of pipe wall irregularities of commercial pipes. Other than pipes, absolute roughness is also used for representing the irregularities of other equipment walls, for example, walls of heat exchanger shell.

Pipe Roughness - Pipe Flow Software

Pipe Roughness Commercial pipes comes in many different materials and many different sizes. The internal roughness of a pipe is an important factor when considering the friction losses of a

Stainless Steel 316L - Relative Roughness - Industrial ...

Hein, the roughness of new piping and tubing is more dependent on the manufacturing method than on the material. I suspect that the value of 0.015 mm listed on the page you referenced is intended for commercial stainless steel piping rather than for tubing.

Roughness of pipes - spray

Aluminium, drawn/pressed: new: 0.0013 - 0.0015 mm: Aluminium, drawn/pressed: used: to 0.03 mm: Asbestos-cement: new, smooth: 0.03 - 0.1 mm: Brass, drawn/pressed

Surface Roughness Conversion Chart of Stainless Steel Pipe

Surface roughness —also known as surface profile Ra—is a measurement of surface finish -- it is topography at a scale that might be considered "texture" on the surface.Surface roughness is a quantitative calculation of the relative roughness of a linear profile or

Major loss in Ducts, Tubes and Pipes - Engineering ToolBox

The pressure loss in pipes and tubes depends on the flow velocity, pipe or duct length, pipe or duct diameter, and a friction factor based on the roughness of the pipe or duct, and whether the flow us turbulent or laminar - the Reynolds Number of the flow. The pressure loss in a tube or duct due to friction, major loss, can be expressed as:[PDF]

pipe rough values - pumpfundamentals

Pipe absolute roughness values (RMS) Material Absolute roughness ... iron1 6 152 Cast iron – asphalt dipped1 4.8 122 Cast iron uncoated1 10 254 Carbon steel or wrought iron1 1.8 45 Stainless steel1 1.8 45 Fiberglass3 0.2 5 Drawn tubing – glass, brass, ... Fiberglass Pipe Handbook, SPI Composites Institute . Title: Microsoft Word - pipe ...

Absolute Roughness of Pipe Material – Neutrium

Absolute roughness is a measure of the surface roughness of a material which a fluid may flow over. Absolute roughness is important when calculating pressure drop particularly in the turbulent flow regime. This article provides some typical absolute roughness values for common conduit materials.

TYPICAL SURFACE ROUGHNESS - Engineering Page

Wall roughness factors for pressure drop calculation. Calculations on our website can be used free of charge.[PDF]

Roughness measurements of stainless steel surfaces

1 Roughness measurements of stainless steel surfaces Introduction Ra value Surface roughness is a measure of the texture of a surface. It is quantified by the vertical deviations of a real surface from its ideal

316 stainless steel pipe roughness- Jianye Stainless Steel

Stainless Steel 316L - Relative Roughness -... Stainless Steel 316L - Relative Roughness ... stainless steel has an absolute roughness of 0.015 ... and this is probably a good policy to follow in pipe sizing ...

Pipe Roughness Coefficients Table Charts | Hazen-Williams ...

This table lists the roughness Coefficients of Specific roughness, Hazen-Williams Coefficient and Manning Factor.

Pipe Roughness Coefficients Table Charts | Hazen-Williams ...

This table lists the roughness Coefficients of Specific roughness, Hazen-Williams Coefficient and Manning Factor.

Roughness Stainless Steel Pipe, Roughness ... - Alibaba

Roughness Stainless Steel Pipe, Wholesale Various High Quality Roughness Stainless Steel Pipe Products from Global Roughness Stainless Steel Pipe Suppliers and Roughness Stainless Steel Pipe Factory,Importer,Exporter at Alibaba.

Surface roughness - Wikipedia

Surface roughness often shortened to roughness, is a component of surface texture. It is quantified by the deviations in the direction of the normal vector of a real surface from its ideal form. If these deviations are large, the surface is rough; if they are small, the surface is smooth.Parameters·

Roughness Stainless Steel, Roughness Stainless Steel ...

Alibaba offers 7,810 roughness stainless steel products. About 8% of these are machining, 3% are stainless steel bars, and 1% are stainless steel pipes. A wide variety of roughness stainless steel options are available to you, such as plate, welded, and coil.

Stainless Steel Pipe Surface Finish Types - tubingchina

Standard Mill Finished - Stainless Steel Flat Rolled Products. The Standard Mill Surface Finished are laid down in Specifications BS 1449, Part 4, and the Committee of Stainless Steel Producers, American Iron & Steel Institute.. The finished are designated by a system of numbers, and these are broadly described hereunder relative to the finishing operations employed.

Finishing stainless steel for food-grade applications ...

Finishing stainless steel assemblies for handling food and beverage applications is more complicated than non-sanitary applications. Knowledge of the tools, consumables, and techniques is critical, but likewise the contractor must be familiar with sanitary standards so the system and its finish are ...

Pipe Roughness, Some Starting Point - Industrial ...

In literature pipe roughness values (ε) used in Darcy formula are in close agreement to those quoted by Ankur. We observe that ε=0.046 mm for non corroded steel pipe, versus ε=0.46 mm for corroded, which verifies the ten fold increase reported by Coulson - Richardson in "Chemical Engineering".[PDF]

DESIGN COEFFICIENT TABLES - CECALC

DESIGN COEFFICIENT TABLES Hazen-Williams Friction Factor (C) Pipe Material Values for C ... Cement or mastic lined iron or steel pipe 160/130 148 140 Copper, brass, lead, tin or glass pipe or tubing 150/120 140 130 Wood Stave 145/110 120 110 Welded or Seamless Steel 150/80 130 100 ... Kerby’s Roughness Coefficient Categorized by surface Kerby ...[PDF]

Guide to Stainless Steel Finishes - imoa.info

GUIDE TO STAINLESS STEEL FINISHES Euro Inox Euro Inox is the European market development associa-tion for stainless steel. ... surface roughness Ra, and inspection crite-ria. Reference samplesshould be prepared to the agreed standard and held by each party. Metro stations on the

Stainless Steel Pipe - Pipe - Grainger Industrial Supply

High-quality stainless steel pipe from Grainger can be an excellent material for plumbing applications. High corrosion resistance can make it a good choice for drinking water transfer, even at high flow rates, and its aesthetic appeal helps stainless steel to blend well with modern architecture and interior designs.[PDF]

Leveraging Stainless Steel Finishes on Sanitary

LEVERAGING STAINLESS STEEL FINISHES ON SANITARY EQUIPMENT Leveraging Stainless Steel Finishes on Sanitary Equipment ... average to determine roughness. RA Surface Textures of Stainless Steel Finishes* Mill Finish 2B Mill Finish No 3 Finish No

schedule 40 steel pipe roughness(Seamless Carbon Steel ...

Shandong Zhongye Petroleum Machinery Co.,Ltd Here.We are professional in the field of manufacturing and exporting seamless steel pipe,especially structual pipe,drill pipe,liquid pipe,hydraulic pipe,line pipe and steel pipe for petroleum service etc.We can supply the pipe OD:48-406mm,WT:4-30mm ,The length up to 12m.

fritcion factors, materials - Pipelines, Piping and Fluid ...

Mar 31, 2012· Since then I've used the same absolute roughness for all "steel pipe". Copper and aluminium are both about 5E-6 ft. The source I found for that claims that PVC and stainless

ISO 1302 DIN 4768 Comparison of Surface Roughness Values ...

ISO 1302 DIN 4768 Comparison of Surface Roughness Values - Stainless Steel T.pdf - Download as PDF File (.pdf), Text File (.txt) or read online. Scribd is the [PDF]

PIPE ROUGHNESS VALUES - pumpfundamentals

Pipe absolute roughness values (RMS) Material Absolute roughness (in x 10-3) Absolute roughness ... Stainless steel1 1.8 45 Fiberglass3 0.2 5 Drawn tubing – glass, brass, plastic1 0.06 1.5 ... Fiberglass Pipe Handbook, SPI Composites Institute . Title: PIPE ROUGHNESS VALUES[PDF]

Surface Roughness on 304 Stainless Steel - comcoinc

10um Alox . 17.5um Alox . 25um Alox . 50um Alox . 100um Alox . 150um Alox . 20um SiC . 50um SiC . 50um Pumice . 35um Glass Bead . 50um Glass Bead . 100um Glass Bead

Stainless steel pipes SCH 10S chart, dimensions, weight ...

Pipe weights are presented for stainless steel TP304L with density of 7.9kg/dm 3

Stainless steel hydraulic tubing — Sandvik Materials ...

Hydraulic tubing and instrumentation tubing Hydraulic tubes and instrumentation tubes in a comprehensive range of corrosion-resistant stainless steels and nickel alloys covering outside diameters from (OD) 1.59 to 50 mm (0.0625 to 1.968 in.).

Absolute Roughness - piping-designer

Absolute Roughness. Absolute roughness ( \(\epsilon\) (Greek symbol epsilon) ) is a measure of the roughness of the inside of a flowing pipe. It is used in conjunction with the inside diameter to calculate the friction factor using a Moody Diagram, the Reynolds Number and the Darcy-Weisbach Equation. Common values for the absolute roughness are listed below.

SBER Seamless Stainless 6 | Surface Roughness | Pipe ...

Surface roughness 13 Today. perfect workmanship and punctuali- ty. ... A seamless stainless steel pipe can pass through as many as 100 production steps before taking on its final form and quality. ... Documents Similar To SBER Seamless Stainless 6. JIS Seamless Pipe. Uploaded by. Jay Panalangin.

Relationship between roughness height in use with ...

Commercial stainless steel (SS) pipes exhibit different surface roughness characteristics that produce higher friction factor (λ) and higher effective roughness height (k s) than that of commercial steel (CS) pipes having the same roughness parameter represented by the r.m.s. value of the surface profile (R q).

Stainless Steel Seamless Pipe Polishing | Penn Stainless ...

Stainless steel pipe polishing is an important process for manufactures and architectural applications. Polishing stainless steel pipes creates a uniform and consistent surface finish–vital for tank manufactures and OEMs supplying products to the chemical and pharmaceutical industries.[PDF]

MATERIAL & WELDING FINISHES FOR SANITARY

MATERIAL & WELDING FINISHES FOR SANITARY STAINLESS STEEL EQUIPMENT ... Surface Roughness is an indication of the marks left on the metal surface ... Electropolishing stainless steel vessels obtains improved corrosion resistance by: reducing the exposed product surface[PDF]

PIPE ROUGHNESS COEFFICIENTS (“C” FACTOR)

Wet s yste ms c onst ructe d us ing steel pipe have a higher “C” factor than dry systems because once the oxygen in the water in a wet system is depleted by corrosion, the corrosion of the pipe

Stainless Steel Pipe Suppliers - thomasnet

Welcome to the premier industrial resource for Stainless Steel Pipe . We supply a broad range of stainless steel pipe including stainless steel pipe clamps and couplings, as well as seamless, flexible and food grade stainless steel pipe. Use this comprehensive vertical portal to find stainless steel pipe fittings, hose fittings, specialties and stainless steel pipe supports.[PDF]

PIPING MATERIAL SPECIFICATION (PROJECT

PIPING MATERIAL SPECIFICATION (PROJECT STANDARDS AND SPECIFICATIONS) TABLE OF CONTENTS 1 GENERAL 2 ... PIPING MATERIAL SPECIFICATION (PROJECT STANDARDS AND SPECIFICATIONS) 1. GENERAL ... ASME B36.19 Stainless Steel Pipe ASME B46.1 Surface Texture (Surface Roughness, Waviness, and Lay) ...[PDF]

Stainless Steel Seamless Tubing and Tube Support

Stainless Steel Seamless Tubing—Fractional, Metric, and Imperial Sizes 3 STANDARD TUBING Ordering Information, Dimensions, and Pressure Ratings

Standard Specification for Seamless and Welded Austenitic ...

1.1 This specification covers grades of seamless, welded, and heavily cold worked welded austenitic and ferritic/austenitic stainless steel sanitary tubing intended for use in the dairy and food industry and having special surface finishes. Pharmaceutical quality may be requested, as a

What is loss coefficient in pipes? - Quora

The pressure loss in pipes and tubes depends on the flow velocity, pipe or duct length, pipe or duct diameter, and a friction factor based on the roughness of the pipe or duct, and whether the flow us turbulent or laminar - the Reynolds Number of the flow. The pressure loss in a tube or duct due to friction, major loss, can be expressed as:

SSINA: Stainless Steel: Finishes

ASTM A 270 describes stainless steel tube finishes for sanitary service but the finish requirements could be applied to tube and pipe purchased for other applications. Sheet Is less than 3/16 inch (4.76 mm) thick and at least 24 inches (609.6 mm) wide.[PDF]

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Moody chart - Wikipedia

In engineering, the Moody chart or Moody diagram is a graph in non-dimensional form that relates the Darcy-Weisbach friction factor f D, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe. It can be used to predict pressure drop or flow rate down such a pipe.History·

Surface Roughness Conversion Chart - Buford, GA - CAB ...

The table below shows comparisons of various surface roughness scales. The information contained in the table is based on the assumption that metal surfaces are being tested. Comparison values may vary by [PDF]

Stainless Steel - Yieh Corp.

Stainless Steel 1 - 2 Stainless Steel About Stainless Steel 1-3 ‧ Producing Flowchart 1-4 ‧ Approximate Comparative Table 1-5 ‧ Chemical Composition 1-6 ‧ Mechanical Property 1-8 ‧ Surface Finish 1-10 Stainless Steel Billet / Slab 1-11 ... Pipe 。 No.2D Those finished, after cold ...[PDF]

Chemical Surface Treatment of Stainless Steel -

See "Stainless steel and corrosion", Chapter 12.2.1. A signifi cant advantage of the passivation is the fact that the surface roughness is not affected (mea- surably) by the process.

Ra value on Type 304 Stainless Steel - Finishing

topic 30791 Ra value on Type 304 Stainless Steel (2004) Due to stress fractures while forming with type 304 stainless steel , I have discovered that the Roughness average is very important in maintaining material integrity while forming.

Calculate expected flow rate through a tube - Pipe Flow ...

May 20, 2011· Hi, I was wondering if someone could assist me in working out the expected flow rate (or velocity is fine) in a horizontal stainless steel tube.[PDF]

Electropolishing Stainless Steels

Euro Inox Euro Inox is the European market development asso-ciation for stainless steel. Members of Euro Inox include: • European stainless steel producers

Stainless Steel Tubing - Tubing - Grainger Industrial Supply

Welded Stainless Steel Tubing can be bent and cut to required shape and length. It is telescopic with adjacent sizes, and ideal for use in day-to-day pipe work, as well as for bushings, spacers, guide tubes, standoffs, and bearings.

Surface treatment process of stainless steel pipeline - Yaang

Improving the surface quality of stainless steel pipelines, including improving the surface morphology and structure, and reducing the number of layers, the common surface treatment methods at present are mechanical drawing, mechanical lapping, polishing and burning.. Mechanical drawing. The mechanical drawing is to increase the surface roughness of the pipeline by using the plug bolt ...

Stainless Steel Polishing Services | Stainless Pipe ...

Shaw Stainless is an industry leader when it comes to stainless steel polishing services. Our stainless polishing services is a secondary process on mill finish stainless steel that produces an aesthetically pleasing surface finish.

Hazen Williams Roughness Coefficient - WikiEngineer

Roughness and Hazen Williams Coefficients for various pipe materials (carrying water): One of the values of using the Hazen Williams Equation is that the value C, does not depend on Reynolds Number .

Absolute Roughness - Stainless Steel Pipe - AFT Forums

Can someone provide the basis for the absolute roughness (0.0006") provided in Arrow for stainless steel pipe?

Finishing stainless steel tube and pipe efficiently - The ...

Finishing stainless steel tube and pipe efficiently This is not your daddy's metal. The Tube & Pipe Journal April/May 2007 May 8, 2007 By: Kate Bachman One big challenge in stainless steel tube finishing is the growing expectations about the surface finish.

Stainless Steel finishes/roughness

Stainless Steel finishes/roughness 2006. I work in the pharmaceutical field where much of our equipment/components are made of stainless steel. We require (or prefer) all surfaces that come in contact with product to be mirror finish or electropolished. Both finishes appear to be the same.[PDF]

SeamleSS StainleSS Steel PiPeS & tUBeS - Tubacex

flow Chart of tuBe forming 100 steps to perfection. A seamless stainless steel pipe can pass through as many as 100 production steps before taking on its final form and quality.

Surface Roughness Table - bhpipe

Surface Roughness Table - Shows the roughness average for different manufacturing processes in micrometers and microinches. The values are shown with a typical range and a less frequent range for each manufacturing process.

ASTM A270 Sanitary (hygienic) Stainless Steel Tube/Pipe ...

ASTM A270 sanitary (hygienic) stainless steel tubing is the standard specification for the welded seamless, and heavily cold worked welded austenitic and ferritic stainless steel sanitary tubing. ... (surface roughness, waviness and layers). ... Sanitary stainless steel pipe and tube shall be capable of passing corrosion tests in the as-shipped ...

Surface Roughness Conversion Chart of Stainless Steel Tube

Stainless Steel Tube's Surface roughness is the measure if the finer surface irregularities in the surface texture. These are the result of the manufacturing process employed to create the surface.[PDF]

Stainless Steel Fittings - valex

Tube, Pipe Fittings Stainless Steel. One Trusted Source - Worldwide ... these are our customers. As manufacturing processes grow more precise, our customers’ needs for stainless steel piping systems evolve to ever more demanding levels of cleanliness, leak integrity, corrosion resistance, ... •ace roughness measurement Surf

Surface Roughness Conversion Chart of Stainless Steel

Stainless Steel Tube 's Surface roughness —also known as surface profile Ra—is a measurement of surface finish -- it is topography at a scale that might be considered "texture" on the surface. Surface roughness is a quantitative calculation of the relative roughness of a linear profile or area, expressed as a single numeric parameter (Ra).

Duplex Stainless Steel Pipe - great-pipe

348HS34809: Stabilized stainless steel which offers an excellent resistance to intergranular corrosion following exposure to temperature in the chromium carbide precipitation range from 800 to 1500 °F

Ss 304 316 201 316l 304l 430 301 Roughness Stainless Steel ...

Ss 304 316 201 316l 304l 430 301 Roughness Stainless Steel Pipe , Find Complete Details about Ss 304 316 201 316l 304l 430 301 Roughness Stainless Steel Pipe,Stainless Steel Pipe,Roughness Stainless Steel Pipe,Ss 304 316 201 316l 304l 430 301 Stainless Steel Pipe from Stainless Steel Pipes Supplier or Manufacturer-Foshan Nanhai Pinsanon Metal Products Co., Ltd.

ISO 1302 DIN 4768 Comparison of Surface Roughness Values ...

Stainless Steel Bright Annealing/Annealed Tubes 6.ISO 1302 DIN 4768 Comparison of Surface Roughness Values .Stainless Steel Tube DIN 4768 to 0. Post weld cleaning and finishing of stainless

ISO 1302 DIN 4768 Comparison of Surface Roughness

Surface Roughness Conversion Chart of Stainless Steel Tube 8. surface finish and testing of stainless steel 13.5 63 100 160 250 Stainless Steel Producer Care and maintenance of stainless steel 12.[PDF]

Review of the Margins for ASME Code Fatigue Design

Effects of Surface Roughness and Material Variability by O. K. Chopra and W. J. Shack Abstract The ASME Boiler and Pressure Vessel Code provides rules for the construction of nuclear power plant components. The Code specifies fatigue design curves for structural materials. ... Fatigue life of Type 316 stainless steel under constant and varying test[PDF]

Stainless Steel Pipe - imoa.info

Stainless Steel pipe can be ordered in 20-foot and 40-foot lengths and even 60-foot lengths for pipe diameters up to 16-inches. Ductile iron is only available up to 20 feet in length.The number of joints, and therefore cost, is reduced for long Stainless Steel pipe strings. 2[PDF]

Stainless Steel Pipe Chart

STAINLESS STEEL PIPE CHART Visit us at http:/jpsteel.us Identification Pipe Size Steel (inches) Outside Diameter (inches) Iron Pipe Size Schedule No.

SR100 Surface Roughness Tester - Starrett

The Starrett SR100 Surface Roughness Tester is powerful, accurate and easy to use. It is ideal for checking large components, structures, auditing batch prior

2205 - Rolled Alloys, Inc.

2205 is a duplex (austenitic-ferritic) stainless steel containing about 40 - 50% ferrite in the annealed condition. 2205 has been a practical solution to chloride stress corrosion cracking problems experienced with 304/304L or 316/316L stainless.

Seamless Steel Pipe - Hunan Prime Steel Pipe Co., Ltd

Surface strength seamless steel pipe, the surface roughness of the original rust into a degree, abrasive coating material to choose, in order to achieve better results, as well as the role of grit etched steel surface, has strengthened steel shot the role of steel surface, mixing abrasive steel shot and grit, for it can be a single layer of ...[PDF]

Stainless Steel – Surface Finishes - Stealth 316

and stainless, which often become focal points for localised corrosion. All stainless steel finishes perform better when cleaned and maintained and details of correct cleaning procedures may be found in our publication, “The Cleaning and Maintenance of Stainless Steel”.

神龙产品列表 - Cangzhou Shenlong Pipe Manufacturing ...

Stainless steel seamless pipe, stainless steel welded pipe, stainless steel seam.. SHS pipe Rectangular pipe, pipe, square tube, rectangular tube, pipe, steel, special stee..

Friction factor for stainless steel pipe - Answers

D- inside diameter of the pipe. for stainless steel the the absolute roughness value is 0.0018inches or 0.000045metre. you could substitute the value in the above formula and find out the relative ...

Absolute Pipe Roughness

Absolute Pipe Roughness is usually defined for a material and can be measured experimentally. Following table gives typical roughness values in millimeters for commonly used piping materials.[PDF]

STAINLESS STEEL and PVC ROLLER CATALOG - Omni

THE TABLE OF CONTENTS Stainless Steel and PVC Rollers General Information 2-3 1" 4 1" Pipe Rollers (1.315" O.D.) 4 1 3/8" 5 1.9" 6-8 2 1/2" 9 All information is subject to change without notice.

Pipe - Seamless Pipe - Schedule 160 - Page 1 - PipingNow

Stainless steel pipe fittings and valves are the focus of PipingNow. Our large inventory allows for quick shipping!

Stainless steel pipes SCH 40S chart, dimensions, weight ...

Pipe weights are presented for stainless steel TP304L with density of 7.9kg/dm 3

Roughness effects of commercial steel pipe in turbulent ...

The mean turbulent flow over a transitional rough commercial steel pipe is considered in terms of alternate inner roughness variables. The matching of inner layer and outer layer in the overlap region leads to the universal log laws for velocity profile and friction factor, explicitly independent of surface roughness of all kinds.Published in: Canadian Journal of Civil Engineering · 2013Authors: Afzalnoor

304L 316L Stainless Steel Pipe Prices : brismet

Stainless Steel Pipe For the best in stainless steel pipe, turn to brismet.For 300 series welded pipe and tube, BRISMET has an extremely vast production range, offering pipe sizes ranging from ½” to 144” (Nominal Pipe Size) and tubing sizes from 4” to 12” (Outside Diameter).

Stainless Steel Surface Finish Specifications | Polishing ...

Stainless Steel Tubes Surface Roughness Review 5. Stainless Steel Bright Annealing/Annealed Tubes 6. China USA Surface Roughness Standard Comparison 7. Surface Roughness Conversion Chart of Stainless Steel Tube ... schedule 40 stainless steel pipe price, schedule 10 stainless steel pipe properties, schedule xxs stainless steel pipe pressure ...

astm a53/a106 gr.b carbon steel pipe roughness, View ...

Tianjin Wanlei Steel Pipe Co., Ltd is one of companies specializing in producing and exporting. steel pipes and pipe fittings in China.[PDF]

AWH Pipes and Accessories 4.1

Stainless Steel 4 Roughness 5 ... Flat Steel / Angled Steel 28 Square Tube / Round Steel 29 Pipe Clamps 30 ... The designation "stainless steel" is a general generic term for rust-proof steels. The chrome content in the steel is generally at least 12 %. This makes it resistant to oxidising corrosive agents. If the chrome alloy or other alloy ...

Product Description:

shipbuilding steel stock


ABS,LR shipbuilding steel


steel for shipbuilding and oil platform:

Henan BEBON Iron & Steel Co., Ltd , is professional in exporting the steel for shipbuilding and oil platform. Our product have the following several feature
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