SOLDADA, TUBULAÇÃO DE AÇO VS TUBULAÇÃO DE AÇO SEM COSTURA PRODUTOS E PROCESSOS SIGNIFICATIVOS

1.0 PRODUCTS AND SIGNIFICANT PROCESSES:
1.1 Products sketched out in this archive is as of now recognized by the title i.e. Sectoral Manual for STEEL PIPES, TUBOS AND FITTINGS which however identifies with particular utilities like for conveying water, gás, air steam and so on., for use in basic purposes, for General Engineering purposes and so on. Funnels of different materials, (Os íons de hidrogênio da reação de corrosão aderem à superfície do aço e penetram no interior do aço como hidrogênios atômicos, Cast Iron, PVC, PEAD, Concret and so forth.) or even some other steel channels having diverse utility like oxygen spearing, course pipe utilized for insurance of electrical wiring framework and so on have been kept out of the domain of this manual.
1.2 For comprehension about the standard items managed in this together with their assembling forms the accompanying illustrative note (Ref. 1.3 Para 1.5 underneath) and wording (Ref. 2.0) as depicted in various norms under thought including those characterized at IS 1956 (Pt. VIII) – 1976 (Glossary of terms identifying with Iron and Steel: Steel Tubes and Pipes) and IS 812 – 1957 (Glossary of terms identifying with Welding and Cutting of Metals) as well as Metals Hand Books distributed by American Society for Metals would demonstrate helpful.

1.3 WELDING STEEL PIPE PROCESSES

In this procedure longitudinal framed chamber (say out of sheet, skelp, nível, strip, plate and so on.) are joined at the longitudinal crease by forms like :-
um) Solda de resistência elétrica (ERW) – It utilizes a progression of operations, in the first the level moved steel is chilly molded into tubular shape. Welding is affected by the use of weight and warmth produced by enlistment or by an electric flow through the crease. The welding weight is created by tightening rolls and the electromagnetic impacts of the high welding current. Electric protection welded tubular items having longitudinal crease are generally made in sizes from 3.2 mm para
0. 6 m genuine outside distance across, however bigger sizes are additionally produced.
b) Furnace Butt Welding – In heater butt welding, skelp with square or insulting sloped edges is heater warmed to the welding temperature. The warmed estoque is roll framed into round and hollow shape as it rises shape the heater, extra warmth is generally given by an Oxygen or air fly impinging the crease edges and the tube goes through contracting rolls where the crease edges, are welded by the weight of rolls. Heater butt welded items are accessible in ordinary dia from 3.2 mm para 100 mm.
c) Fusion Welding – In this procedure the level moved steels with edges reasonably arranged, is framed into tubular shape either by hot or cool forming. The level moved steel might be formed longitudinally (straight crease) or twisted into helical longitudinally (winding welded). The edges are

tubos de aço sem costura

welded with or without all the while keeping filler metal in a liquid or liquid and-vapor state. Mechanical weight isn’t required to impact welding. Combination might be expert by either electrical circular segment or gas warming or by a mix of both.

1.4 TUBULAÇÃO DE AÇO SEM COSTURA PROCESS

1.4 SEAMLESS STEEL PROCESS
Steel tubular items delivered via consistent procedures are made in distances across for the most part up to 0.66 m by the revolving penetrating technique and up to 1.22 m by hot expulsion.
um) Rotary Piercing-In revolving penetrating, rounds of the vital width and length are first warmed to moving temperature. Each hot round is sustained into an arrangement of rolls having crossed tomahawks and surface forms that force it through the moves, along these lines bursting it longitudinally. The power of the moves at that point makes the metal stream around a penetrating point, amplifying the pivotal opening, smoothing within surface and framing a tube. Subsequent to being penetrated, the unpleasant tube is typically hot moved to conclusive measurements.
b) Piercing-A imprensa puncionando a planta é feita de três componentes essenciais: Um movimento permanecem com uma redonda passa entre dois rolos conduzidos; um empurrador de boleto; e uma prova resolvida situada entre os dois rolos. O boleto, englobadas em um quatro lados gerenciar, uma restrita contra o acessório pela atividade se juntou o pressor e os rolos de determinado. O material de torção inato neste procedimento em basicamente compressiva, com baixo alongamento (1.2% maior), e, consequentemente, o material de boleto (fashioned or constantly cast) isn’t subjected to high elastic anxieties. In the wake of being punctured, the harsh tube is hot moved to definite measurement.
c) Hot Extrusion is a hot working procedure for making hollows, appropriate for handling into completed the process of tubing of consistent and unpredictable frame, by compelling hot, prepierced billets through a reasonably molded hole shaped by an outer bite the dust and interior mandrel.