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ACID PICKLING OF STEEL & PICKLING TANK

  Steel pickling is part of the finishing process in the production of certain steel products in which oxide and scale are removed from the surface of strip steel, steel wire, and some other forms of steel, by dissolution in acid. A solution of either hydrogen chloride (HCl) or sulphuric acid is generally used to treat carbon steel products, while a combination of hydrofluoric and nitric acids is often used for stainless steel. Steel pickling and the associated process of acid regeneration result in the emission of hazardous air pollutants (HAPs). STEEL PICKLING During the hot rolling or heat treating of steel, oxygen from the atmosphere reacts with the iron in the surface of the steel to form a crust that is made up of a mixture of iron oxides. The presence of oxide (or scale) on the surface of the steel is objectionable when the steel is to be subsequently shaped or cold-rolled and coated. Numerous methods have been used to remove iron oxides from metal surfaces. These method
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  Post Covid - 19 crisis customers have changed interaction dynamics with suppliers and the mechanism of face to face discussion with displays /catalogues /data   and assessment of compliance, clarity and creation of trust has disappeared. Customers are now providing details digitally including virtual plant visit, web meeting on clarification on requirement including negotiation meeting and finalization of requirements. There is substantial savings of time and resource cost however, things are not happening that fast as it reads. Industrial products options are varied to a large extent and the process of trust on supplier and the preferred option is not simple. In B2B sales in the past sales expert’s skill on complete understanding from end user on personal visit to application location used to be similar to a physician checking a patient with stethoscope. No matter the help of technology and latest digital media - the thread of understanding is missing today. There used to be a diffe

Effect of Water on piping material

  Any type of water, it may be river water, sea water, raw water, ground water or natural water has the adverse effect on piping material due to its characteristics. The Severity of effect on piping material is different on base of water hardness, alkaline content, presence of organic content, etc. Water used for irrigation piping is mainly river water which is soft in nature.  Still it affect piping wall with longer run on base of selected piping raw material. Various material used for transportation of water is HDPE, PVC, GRP, MS, DI, CI, PSC etc. Water has always corrosion effect on material when it comes into contact with piping wall of metals. In case of DI pipe Protective internal linings and external coatings are often applied to ductile iron pipes to inhibit corrosion: the standard internal lining is cement mortar and standard external coatings include tapes. In highly corrosive environments polyethylene encasement may also be used. Life expectancy of unprotected ductile iron p

Trenchless Technology

Trenchless technology can be described as a type of subsurface construction work that requires few trenches or no continuous trenches. Trenchless technology is an underground construction method of installing, repairing and renewing underground pipes, ducts and cables using techniques which minimize or eliminate the need for excavation. The process of trenchless technology Trenchless technologies involve methods of new pipe installation with minimum surface and environmental disruptions. Construction can be carried out under a busy highway without closing it to traffic. Traffic congestion is significantly reduced, resulting in less air and noise pollution. Trenchless projects are also less hazardous to workers, as the process can be controlled from the surface. In many densely populated urban areas, open-cut excavations are simply not practical and the social costs are too great. Also, open-cut excavations tend to increase pavement failures and can result in damage to adjacent structur

SAND IN GRP PIPES

  GRP  (Glassfiber Reinforced plastic) is a non metallic engineered composite. GRP pipe is called engineered material as you design it for specific duty conditions, applications. Properties of composite can be engineered by right mix of components (mainly, glass fiber roving and polyester resin) & with placement of glass fiber in laminate. Apart from above, various additives, fillers, aggregates can be added to enhance specific properties like fire resistance, UV inhibitors, abrasion resistance, stiffness etc. Long before, process of manufacturing GRP pipes was mostly manual without sophisticated mechanical means. Manufacturing process has been evolved over the years with more automation, with PLC, online visual – audio controls. This has resulted in better, consistent, compacted & more uniform pipe laminates. This helps to design & achieve pipe laminates with sand addition allowing offering economical design meeting requirements. When GRP pipe has sand as one of the raw ma

GRP PIPES AND FITTINGS vs HDPE PIPES AND FITTINGS FOR SWRO PLANT - COMPARISON OF CAPABILITIES

 E c o no m i c s : HDPE Pipes are designated with outer diameter as they are manufactured by extrusion.  T hu s f o r   fl o w di a me t e r ( s ay 12 0 0 mm )   , 6   b a r   p i p e   ,t h e   h i g h e r si z e o f   1 40 0 m m   d i a   t o   b e   s e le c t e d. In case of  F R P / G R P   Pi p e   t h e   d i a m e t e r d e c lare d   i s   n o mi n a l   o r   f lo w   di am e t e r   s o   12 0 0   m m   d i a   6 b a r   pi p e   i s   e n o u g h t o   m e e t   t h e   r e q u i r e m e n t s . When   proper  engineering  is worked out   for  both  types  of  systems,  the  product  and installation cost of FRP becomes highly competitive when comparing it to HDPE. Both products, if properly engineered, can do a good job.  . FRP  pipe  should  also  be  considered for underground  installations due to its superior material properties and installation benefits. As for above  ground  pipe  installations,  FRP  should  almost always  be  the material of choice. Thermal Expans