Y Tee Pipe Fitting – Perhaps You Have Thought Of Why You Might Need This..

We get plenty of questions regarding welding pipe. Whether it’s about welding high-pressure pipe, 3pe Pipe Coating Line for food and beverage industries, or pipe for the oil and gas industries, there are a number of common elements we see in pipe welding and fabrication which lead to problems. Included in this are from improper shielding gas and drive rolls to choosing a MIG gun with too low of an amperage rating. As companies push to train new welders, work with new materials, increase quality and productivity, and improve safety, you should concentrate on many of these basic variables within the pipe welding method that could affect these efforts. In this article, we’ll take a look at 13 of the most common issues we percieve in pipe welding applications and the way to resolve them.

1. Forgetting to grind the joint after oxyfuel or plasma cutting

The oxyfuel and plasma cutting processes put in a layer of oxide towards the cut edge. This oxide layer should be removed before welding, as the oxide often includes a higher melting point than the base metal. When the arc gets hot enough to melt the oxide, it’s too hot for the base metal and can result in burnthrough. The oxides could also remain in the weld and cause porosity, inclusions, absence of fusion as well as other defects. It is essential that welders remember to grind the joint right down to the parent material prior to welding, as well as grind the outside and inside diameters of the pipe to get rid of these oxides as well as other potential contaminants.

2. Cutting corners with cutting

When welders work with materials more prone to distortion and the affects of higher heat input, like stainless steel and aluminum, a bad cut can cause poor fit-up and produce unnecessary gaps. Welders then compensate by putting more filler metal (thus, heat) in to the joint to fill it up. This added heat can result in distortion and, with corrosion-resistant pipe like stainless steel, is effective in reducing the corrosion-resistant qualities from the base metal. It may also result in absence of penetration or excessive penetration. Poor preparation also leads to longer weld cycle times, higher consumable costs and potential repairs.

Shops currently using chop saws or band saws to cut pipe found in critical process piping applications should consider buying dedicated orbital pipe cutting equipment to ensure cuts within mere thousandths of the inch of the specified parameters. This precision helps ensure optimum fit-up and keeps the volume of filler and also heat placed into the joint at least.

3. Forgetting to cut out and feather tacks

Tacking is essential to fit-up, and greatest practices recommend that the welder cut out and feather that tack to be sure the consistency of the final weld. Especially in shops when a fitter prepares the Threaded Galvanized Pipe and then another person welds it, it’s essential that the welder knows precisely what is in the weld. Tacks left in the joint become consumed by the weld. If you have a defect within the tack, or maybe the fitter used the incorrect filler metal to tack the joint, there exists a risk for defects inside the weld. Eliminating and feathering the tacks helps eliminate this potential problem.

4. Preparing a joint for MIG processes is different compared to Stick welding

Training welders is actually a top priority for many fab shops, and – for better or worse – many welders bring past experiences with them towards the new job. These experiences could be addressed with adequate training, but one common mistake we percieve is welders with Stick experience not discovering how to properly create a joint for wire processes common in pipe fabrication applications. Welders trained traditionally in Stick and TIG welding often prepare the joint using a heavy landing area and wish to keep the gap as narrow as you can. As pipe shops switch to easier, more productive MIG processes including Regulated Metal Deposition (RMD™), we prefer welders take that landing area down to a knife’s edge and space the joint at approximately 1/8-inch. This region is wider than those trained in Stick and TIG processes are utilized to and can result in several problems: focusing too much heat in to the edges of the weld, an absence of penetration and insufficient reinforcement on the within the pipe. Shops should train their welders towards the details of each application and be sure they understand different weld preparation and operational techniques before they go to work.

5. More shielding gas may not be better

Some welders have a misconception that “more shielding gas is better” and can crank the gas wide open, mistakenly believing they may be providing more protection towards the weld. This method causes a number of problems: wasted shielding gas (resources and price), increased and unnecessary agitation in the weld puddle, and a convection effect that sucks oxygen into the weld and can result in porosity. Each station ought to be outfitted using a flow meter and each welder should learn how to set and adhere to the recommended flow rates.

6. Buy mixed gas – don’t depend on mixing with flow regulators

We now have seen shops that, for any stainless steel application that will require 75/25 percent argon/helium, setup a separate tank of argon and a separate tank of helium and then depend on flow regulators to bleed inside the proper level of shielding gas. The simple truth is you truly don’t really know what you’re getting in a mix using this method. Buying cylinders of Corrosion Coating Steel Pipe from reliable sources, or purchasing a proper mixer, will ensure you know just what you’re shielding your weld with and this you’re implementing proper weld procedures/qualifications.

7. Welding power sources don’t cause porosity

It is far from uncommon to acquire a call from the customer who says “Hey, I’m getting porosity from the welder.” Plainly, welding power sources don’t cause porosity. We tell welders to recount their steps back from the stage where the porosity began. Welders will usually realize that it began just each time a gas cylinder was changed (loose connections, incorrect gas used), a whole new wire spool was put in, when someone didn’t prep the material properly (oxides contained in the weld), or if the content was contaminated elsewhere along the line. Usually the issue is due to an interruption or downside to the gas flow. Tracing back your steps will usually lead dkmfgb the variable that caused the porosity.

Rise Steel consisted of subsidaries of Cangzhou Spiral Steel Pipe Factory, Hebei All Land Steel Pipe Factory, Hebei Yuancheng Steel Pipe Factory, Cangzhou Xinguang Thermal Insulation Pipe Factory .The company is located in Tianjin port, the largest comprehensive port and an important foreign trade port, engaging in the management of steel pipe production nearly 20 years.The company is a high-tech enterprise intigrated with independent production and sales business.We are committed to the concept of “innovation, technology and service”.

Rise Steel consisted of subsidaries of Cangzhou Spiral Steel Pipe Factory, Hebei All Land Steel Pipe Factory, Hebei Yuancheng Steel Pipe Factory, Cangzhou Xinguang Thermal Insulation Pipe Factory .The company is located in Tianjin port, the largest comprehensive port and an important foreign trade port, engaging in the management of steel pipe production nearly 20 years.The company is a high-tech enterprise intigrated with independent production and sales business.We are committed to the concept of “innovation, technology and service”.

Contact Us:
Address: APT. 1202 BLDG. B Kuang Shi Guo Ji Plaza, Tianjin Free Trading Testing Zone (Business Center), Tianjin, China.
Hamer Chen:sales0@rise-steel.com
Eason Gao: sales1@rise-steel.com
Miao lin: sales2@rise-steel.com
Amy Shi: sales5@rise-steel.com
Hamer Chen:+86 18202505824
Eason Gao: +86 18622403335
Miao lin: +86 13251845682
Amy Shi: +86 18630426996

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