Steel industry News

Indian Union Steel Minister urges industry to use domestically produced steel

In the last few quarters, domestic demand for steel has declined due to the economic slowdown followed by the COVID-19 outbreak and resultant shutdowns.

Union Steel Minister Dharmendra Pradhan on Saturday urged all stakeholders of the sector to come together to ensure that industries use only domestically produced steel.

In the last few quarters, domestic demand for steel has declined due to the economic slowdown followed by the COVID-19 outbreak and resultant shutdowns.

"Unless all the stakeholders including the mining industry, the processing industry, the furnace associations, the secondary steel sector or the integrated steel plants, come together, it will be difficult to take steel to another level," Pradhan said.

He was addressing a virtual summit organised by Hyve India along with other steel industry associations.

The minister further said there are many sectors which still do not use domestically produced steel due to various reasons.

"Demand for steel in the domestic market is very low, and we will take up all the programmes that will boost the sector.

"Since Independence, during the last six years, a majority of the reforms have been undertaken by the government to make the raw materials available for the sector. We all should work towards fulfilling our needs with steel completely made in India," Pradhan added.

Last month, Prime Minister Narendra Modi had urged the country to go 'vocal for local' and use the coronavirus crisis to make India self-reliant.

Pradhan further said the initiative to open up coal blocks for commercial mining was with an aim to achieve self-sufficiency in meeting energy needs and boost the industrial sector.

Demand for goods like steel and coal has plunged in the last two-three months, he said, adding it has impacted all the stakeholders.

"We have been hearing and considering all the suggestions, including taxes and incentives given by the industry and have also made a few announcements to give a boost to the sector. We will continue doing our part. We will also soon come up with the (steel) scrap policy," Pradhan added. (moneycontrol)

what is BRIGHT Steel What is difference between Bright and Black (Ms) Steel

What Is Bright Steel

Bright steel is usually a carbon steel alloy which has had the surface condition improved by drawing, peeling or grinding over the hot rolled finish supplied by the steel mill.

Bright steel is essentially black steel material that has had further processing. The bright steel is processed further in cold reduction mills, where the material is cooled (at room temperature) followed by annealing and/or tempers rolling. This process will make steel with closer dimensional tolerances and a wider range of surface finishes. The term bright drawn is mistakenly used on all products, when actually the product name refers to the rolling of flat rolled sheet and coil products.

When referring to bright steels bar products, the term used is “cold finishing”, which usually consists of cold drawing and/or turning, grinding and polishing. This process results in higher yield points and has four main advantages

• Cold drawing increases the yield and tensile strengths, often eliminating further costly thermal treatments.
• Turning gets rid of surface imperfections for bright steels material.
• Grinding narrows the original size tolerance range.
• Polishing improves surface finish.
• All cold products provide a superior surface finish, and are superior in tolerance, concentricity, and straightness when compared to black steel.

Cold finished bright steel bars are typically harder to work with than black steel due to the increased carbon content. However, this cannot be said about bright drawn sheet and black steel sheet. With these two products, the bright drawn product has low carbon content and it is typically annealed, making it softer than black steel sheet.

Uses: Any project where tolerances, surface condition, concentricity, and straightness are the major factors.

DIFFERENCE BETWEEN MILD AND BRIGHT STEEL

BLACK (MS) STEEL BARS Black Steel Bars are produced in a rolling mill by heating raw material such as billet, blooms, etc at a temperature around 1200 C through a number of rolls to achieve the desired shape and size. Some of the shapes are rounds, hexagons, flats, bars, etc. Due to the nature of the process and temperatures involved, precise control of tolerances that can be achieved in bright bars cannot be achieved in black steel bars. Therefore they are further processed to make steel bright bars for processes that require more precise accuracies. Therefore black steel bars are less expensive than bright bars.

BRIGHT STEEL BARS Bright Steel Bars are produced from black bars by passing through dies in a cold condition or by turning the bars in a peeling machine and some other processes. They are used where specific tolerance are required such as for use in CNC machines, etc. Some times heat treatment such as annealing is done before cold finishing. There are five main type of different processes to achieve the desired sizes. ·         DRAWING The black steel bars are drawn through dies of the required shape. The raw material is chosen depending on the shape to be drawn. This increases the yield strength and tensile strength. This also eliminates a number of surface imperfections caused due to the rolling process. ·         PEELING The black bars are turned to the desired sizes. This process eliminates all surface imperfections. But internal imperfections if any are exposed. This process does not increase the tensile strength of the bars ·         GRINDING The grinding process is used to narrow the tolerances and improve the surface finishes of the above two processes ·         POLISHING The polishing process improves the surface finish of the bars ·         COLD ROLLING Cold Rolling is typically used to produce complex shapes.

What Is Schedule Pipe

What Is Schedule Pipe

Schedule  Pipe is the term used to describe the thickness of a pipe. The outside diameter of a pipe is the same for all Schedules in a particular nominal pipe diameter.

standard pipe schedules or pipes sizes as given by ANSI / ASME B36.10M and API 5L. There are eleven schedule numbers commonly used: 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, & 160.

The most popular schedule, by far, is 40. For pipe 8-inches and under, Schedule 40 and Standard Weight pipe wall thicknesses are the same. Schedules 5, 60, 100, 120, & 140 are rarely used. This should be considered when piping is specified for a particular project.

The schedule number is defined as the approximate value of the expression:

Schedule Number = (1,000)(P/S)

Where,

P = the internal working pressure, psig

S = the allowable stress (psi) for the material of construction at the conditions of use.

For example, the schedule number of ordinary steel pipe having an allowable stress of 10,000 psi for use at a working pressure of 350 psig would be:

Schedule Number = (1,000)(350/10,000) = 35 (approx. 40)

METHOD FOR DETERMING SCHEDULE

Measure the inside diameter and divide it by the wall thickness. (inches) R= ID/Thickness

Pipe Schedule	R
Schedule 30	40-50
Schedule 40	29-39
Schedule 60	25-29
Schedule 80	20-23
Schedule 100	16-18
Schedule 120	13-15
Schedule 140	11-13
Schedule 160	9-11

STANDARDS

·         API Standards

o    API Spec 5L - Specification for Line Pipe

·         ASME Standards

o    ASME B36.10M - Welded and Seamless Wrought Steel Pipe

What is difference Between Pipes & Tubes

Hello friends today we know about pipes and tubes what you think is Ms Pipes and tubes same mostly people answered  yes but NO pipes and tubes both are different .so lets know

What is Pipe?

Pipe is a hollow section with round cross section for the conveyance of products. The products include fluids, gas, pellets, powders and more.

The most important dimensions for a pipe is the outer diameter (OD) together with the wall thickness (WT). OD minus 2 times WT (SCHEDULE) determine the inside diameter (ID) of a pipe, which determines the liquid capacity of the pipe.

The most important mechanical parameters for pipes are the pressure rating, the yield strength, and the ductility.

The standard combinations of pipe Nominal Pipe Size and Wall Thickness (schedule) are covered by the ASME B36.10 and ASME B36.19 specifications (respectively, carbon and alloy pipes, and stainless steel pipes).

What is Tube?

The name TUBE refers to round, square, rectangular and oval hollow sections that are used for pressure equipment, for mechanical applications, and for instrumentation systems.

Tubes are indicated with outer diameter and wall thickness, in inches or in millimeters.

Pipe vs Tube, 10 basic differences

PIPE vs TUBE	STEEL PIPE	STEEL TUBE
Key Dimensions (Pipe and Tube Size Chart)	The most important dimensions for a pipe is the outer diameter (OD) together with the wall thickness (WT). OD minus 2 times WT (SCHEDULE) determine the inside diameter (ID) of a pipe, which determines the liquid capacity of the pipe. The NPS does not match the true diameter, it is a rough indication	The most important dimensions for a steel tube are the outside diameter (OD) and the wall thickness (WT). These parameters are expressed in inches or millimeters and express the true dimensional value of the hollow section.
Wall Thickness	The thickness of a steel pipe is designated with a "Schedule" value (the most common are Sch. 40, Sch. STD., Sch. XS, Sch. XXS). Two pipes of different NPS and same schedule have different wall thicknesses in inches or millimeters.	The wall thickness of a steel tube is expressed in inches or millimeters. For tubing, the wall thickness is measured also with a gage nomenclature.
Types of Pipes and Tubes (Shapes)	Round only	Round, rectangular, square, oval
Production range	Extensive (up to 80 inches and above)	A narrower range for tubing (up to 5 inches), larger for steel tubes for mechanical applications
Tolerances (straightness, dimensions, roundness, etc) and Pipe vs. Tube strength	Tolerances are set, but rather loose. Strength is not the major concern.	Steel tubes are produced to very strict tolerances. Tubulars undergo several dimensional quality checks, such as straightness, roundness, wall thickness, surface, during the manufacturing process. Mechanical strength is a major concern for tubes.
Production Process	Pipes are generally made to stock with highly automated and efficient processes, i.e. pipe mills produce on a continuous basis and feed distributors stock around the world.	Tubes manufacturing is more lengthy and laborious
Delivery time	Can be short	Generally longer
Market price	Relatively lower price per ton than steel tubes	Higher due to lower mills productivity per hour, and due to the stricter requirements in terms of tolerances and inspections
Materials	A wide range of materials is available	Tubing is available in carbon steel, low alloy, stainless steel, and nickel-alloys; steel tubes for mechanical applications are mostly of carbon steel
End Connections	The most common are beveled, plain and screwed ends	Threaded and grooved ends are available for quicker connections on site

Types of ms pipes

Types of Ms Pipes.

Hello friends here we understand types of ms pipes.

friends there are mainly 2 Types of Ms Pipes .

1. ERW

2. Seamless

let's see one by one

1. ERW Pipes stands for Electrical Resistance Welding

ERW pipe is first cold formed into a cylindrical shape and then welded longitudinally. both continuous welded and elctric resistance welded pipe are made by shaping rolls of coiled steel into cylindrical forms and welding along the longitudinal seams.

2. Seamless Pipes :

Seamless pipe as the name suggests is a pipe without a seam or a weld-joint in contrast to Seam or Welded pipe. In a Seam or Welded pipe, the seam or the weld-joint is the weaker part of the pipe limiting the strength of the pipe to the strength of the weld-joint.

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