The tube and pipe production technology area encompasses mills and all of the equipment that makes a mill run successfully: tooling, welding units, nondestructive testers, bundlers, scarfing equipment, straighteners, scrap choppers, and washing systems.
June 8, 2012 | By Eric Lundin
The essential tube and pipe production processes on a weld mill haven't changed much since the 1920s. Some new processes are available, such as laser welding, and the line speeds are faster, but much else hasn't changed. One factor that has undergone some change is how the weld bead, also known as scarf and a stringer, is handled. The conventional method was to wind it up as it came off the tube, but OD scarf choppers reduced operator exposure to this strand of red-hot, razor-sharp metal. Similcut has taken safety a step further by introducing a self-feeding OD chopper and wheelless, cantilevered ID chopper.
March 9, 2012 | By Stuart Kleven
The type of inspection needed for piping systems depends on which code or standard is invoked for the project. Understanding the order inspection requirements can make or break a contractor. This article should shed some light on the various pitfalls that can be avoided by understanding the relevant testing requirements.
February 1, 2012 | By James Brooks
Chlorinated lubricants, which have been phased out in Canada and Europe, are still used in many metal-forming applications in the U.S. This class of lubricants is under scrutiny in the U.S., so it makes sense to test alternative lubricants now. Evaluating a lubricant for drawing tube requires much more than simply measuring the draw load during a pull. A comprehensive test evaluates ease of cleaning and finished tube quality also.
December 21, 2011 | By Robert Sladky
Overlooking a small component on a tube or pipe mill—even something as seemingly insignificant as the roller bearings inside the inboard and outboard stands—can lead to excessive downtime. Learning the proper way to install and maintain these bearings can extend their service life and improve the mill’s uptime.
October 10, 2011
As the use of thick-walled pipe for API applications grows, so does the need to verify that it has been correctly normalized. Use of 2-D simulation verifies that the temperatures and heating pattern needed to obtain the desired strength and toughness have been achieved.
Editor's Note: This article is the second of a two-part series. Part I examined the development, design, and functions of the high-precision tube roller (HPTR). Part II discusses the HPTR’s current role and modern applications. At its creation, the high-precision tube rolling (HPTR)...
Initially developed in the 1950s for manufacturing tubing with ultrathin walls for nuclear fuel cladding, the high-precision tube roller (HPTR) continues to provide a fast, economical way to achieve extreme reductions in diameter and wall thickness.
February 25, 2011 | By Scott McLaughlin
OHSA seems to be taking an increased interest in worker safety and, according to OMB Watch, has been citing an increasing number of workplace violations. Tube and pipe producers who remetallize their product pay particular attention to OSHA Directive Number CPL 03-00-008, which deals with a hazard specific to remetallizing operations: explosive dust.
December 8, 2010 | By Paul Williams
For inline cutoff, tube and pipe producers typically use a mechanically driven, single-blade device. This type of cutoff unit is good for most applications, but in many specialized cases, it might not produce good results. Square or rectangular tubes, heavy walls, and lockseam tubing present cutoff challenges that call for a hydraulic unit or a swing blade.
June 8, 2010 | By Laurence Shaheen
Understanding that drawing a tube requires more than just pointing and drawing is a good start to a successful draw. Procuring the raw material, pointing, drawing, straightening, and finishing are the five steps fabricators need to keep in mind.
April 26, 2010 | By John Schwochert
While most fabricators could probably name three methods for notching tube, they actually have six choices. Understanding the advantages and disadvantages of each is the first step in selecting one.
December 2, 2009 | By Mike Rans
Friction saws are the conventional cutoff machines for tube and pipe mills. Drawbacks include hazards (noise and risk of breakage) and burrs they tend to generate. Tungsten-carbide-tipped (TCT) blades, which require more sophisticated sawing machines, run slower and safer, cut cleaner, and are less prone to breakage.
October 20, 2009
New developments in laser-based inspection systems offer tube and pipe mills real-time inspection of laser-welded seams. These systems can help to shorten setup time, improve weld quality, and reduce scrap.
September 25, 2009
Although six-roll straightening machines were the industry standard for decades, 10-roll machines provide twice as many bending moments and therefore turn out straighter, rounder tube.
September 2, 2009
Many mill coolants are available today. Understanding the factors that drive selection and management of these fluids can help to minimize the costs of their use in welded tube production.