Pipe Cleaning

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Pipe cleaning has become heavily scrutinized and the internal and external cleaning is being scrutinized extensively. It is important to understand that pipe is delivered all over the world and is subject to varying environmental conditions. At Pepco we deal with pipe systems that range from water treatment, oil and gas, heavy construction, as well as varying industries such as mining.

Pipe systems are designed to transport commodities throughout a confined space while being under varying levels of pressure. Metals have natural properties that protect against corrosion and exposure to failure but without proper cleaning methods pipe lifespan can be dramatically reduced. On typical systems corrosion is the biggest culprit, but also there can be other defects present.

3 Methods of Cleaning:
1. Mechanical‐Pepco uses mechanical means to clean pipe, grinders, buffing wheels, as well as flapper pads to remove the rust and any defects.

2. Sandblasting‐ Sandblasting can be utilized on internal / external pipe at Pepco, this is a thorough method that allows the rust and any protective coating to be removed and the surface is then prepared to be coated.

3. Chemical‐ The common term for this type of cleaning is “Pickling/Passivation”. Typically, this is used for stainless steel pipe but can also be used in varying carbon steel applications. Passivation is the treatment of the surface of stainless steels, often with acid solutions (or pastes), to remove contaminants and promote the formation of the passive film on a freshly created surface (e.g. through grinding, machining or mechanical damage). Pickling is the removal of any high temperature scale and any adjacent low chromium layer of metal from the surface of stainless steel by chemical means. Where the steel has been heated by welding, heat treatments or other means, to the point where a coloured oxide layer can be seen, there is a chromium depleted layer on the surface of the steel underneath the oxide layer.

Jurisdictional Requirements

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Many jobs that we work on at Pepco Pipe Services have a wide range of certification and jurisdictional requirements. In Alberta we follow ABSA‐ Alberta Boiler Safety Association for a majority of our projects as that is the governing body that we are registered to in accordance with our AQP. Often times we are working with a number of guidelines for various codes:

  • ABSA‐ Alberta Boiler Safety Association
  • ASME‐ American Society of Mechanical Engineers
  • API‐ American Petroleum institute
  • CWB‐ Canadian Welding Bureau
  • AWWA‐ American Water Works Association
  • CSA‐ Canadian Safety Association
  • BCSA‐ British Columbia Safety Authority
  • NSF‐ National Sanitation Foundation

For other projects we have worked on at Pepco recently, we have had to build piping to be used in British Columbia that have unique construction requirements. Registration for systems that leave the province require a review of the specifications that govern said province.

As the economy seems to be shifting and the need for qualified shops is needed more than ever, Pepco has experience on a wide range of regulations and can offer different perspectives on completing job according to the law that applies.

Water Treatment Coating Quality and Testing

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A question that comes up often at Pepco during our water treatment projects has to do with the quality of the coating and its application for drinking water. We are involved in a number of projects throughout Western Canada and we offer 3 solutions.

  1. Tnemic 141‐ Needs time to cure, capable of all sizes, applied to carbon, cost effective.
  2. Scotchkote 134‐ Low Cure Time,Powder, limitations on size, applied to carbon, cost effective.
  3. Stainless Steel Pipe‐ Very high price, ability to modify easily, capable of all sizes.

The most common concern is VOC (Volatile Organic Compounds in Water), testing requires specific guidelines and requirements to satisfy local codes as well as NSF (National Sanitation Foundation). Pepco is involved in the many projects and has the knowledge of client requirements.

Carbon Steel Pipe Benefits

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Carbon Steel Pipe Benefits

6 key benefits of carbon steel are as follows:

1. Safety

Unlike some other materials, carbon steel pipes don’t need to be protected with preservatives, glues or pesticides, which makes them safer to handle and work with. Furthermore, while other pipes may be vulnerable to pests or rotting, carbon steel isn’t, which makes it a great choice for underground piping.

2. Corrosion Resistance

Carbon steel pipes are also resistant to corrosion to a certain extent. This allows builders to use smaller, thinner pipes, even in environments that are acidic or extremely corrosive.

3. Resistance to Shock

Carbon steel pipe offers great resistance to vibration and shock. This is especially important in today’s world, where traffic puts a lot of stress on our roadway foundations. Carbon steel, with its superior shock resistance, seems to hold up better than other pipes when laid under roads.

4. High Tensile Strength
Carbon steel’s high tensile strength makes it safe to use in situations with very high pressures. Plus, this strength means that carbon steel pipe can be made much thinner than pipes made of other materials. This means that they have a higher carrying capacity than pipes made of other materials that have the same diameter.

5. Environmentally Safe

Every year, 70 percent of all steel in North America is recycled–more than aluminum, paper, plastic and glass combined. And steel production is also environmentally friendly. About 50% of the world’s steel is made in plants that use recycled materials or that don’t produce CO2 emissions. Carbon pipe
distributors can rest easy knowing that they’re doing their part to save the environment.

6. Cost‐Effective

No matter the pressure that needs to be withstood, carbon steel pipes can be much thinner than other types of pipes. This means that they have a greater carrying capacity than other pipes.

In Conclusion:
Carbon Steel fabrication is the most commonly used material for Pepco Pipe Services and is very commonly used industry wide. Carbon Steel fabrication is the most commonly used material for Pepco Pipe Services for applications across Canada.

Pipe End Preparation

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At Pepco Pipe services we are specialized in Pipe End preparation. Typically, there are 3 options, Cutting Truck, Machining, or Welding Rig. At Pepco we have both welding rigs as well as cutting services in our facility. The most preferred is on‐site to cut and bevel pipe to meet client specification as well as jurisdictional requirements. The major advantage to utilizing a cutting team is there is a major cost reduction from either utilizing a mobile welder or a
machining company.

Pepco Cutting Truck / Pipe End Prep‐

Machined End

Perfect finish, very costly, very time consuming

Welding Rig Prep

This is very time consuming as the welder has to hand cut the joint by usage of flame, and then prepares the joint with a hand grinder to finish in most cases. This is a usable method but is both time consuming & costly.

At Pepco Pipe Services we strive to guide our clients to successful completion of their projects while maintaining schedules and adding value through the process.

Developing a Company Culture

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When we developed the culture we wanted at Pepco we asked what do we do? First, we Identified what are we here to do, and where do we want to go? We used 3 tools:

1st‐SWOT ANALYSIS

2ND‐MISSION STATEMENT

To provide high performance quality products and services with timely delivery to the specifications at a fair price. We will strive to exceed the needs of both our customers and our employees.”

3RD‐VALUES

At Pepco we have identified what makes our company run and this is our customers and our team. We ensure that we are responsible to producing a quality product, at a fair price, so we can help our customers successfully win projects.

Post Weld Heat Treatment

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Post Weld Heat Treatment (PWHT) is a method of normalizing the welds after completion to ensure the grain structure is able to handle the severe environment, heat, of cyclic service. We encounter projects where we have to price both localized and oven heat treatment methods.

Localized PWHT
A mobile set up will com to our shop and PWHT on‐site, this is very costly but will ensure that schedules are accelerated to oven PWHT methods and allow for quicker completion.

PWHT OVEN

Another method to PWHT is sending spools to a PWHT company where they will use their ovens to complete PWHT cycle. This method is much more cost effective and allows multiple pieces to be completed at the same time.

Purge Gas Dilemma

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With the everchanging requirements in field fabrication, we are continuously finding solutions in the field to close projects. Client Specs are requiring GTAW (TIG) Welding Process for Stainless Steel fabrication in the field is especially challenging to ensure the welder has access to the joint, but almost more importantly there is adequate purge gas.  At Pepco we will calculate the volume of the pipe we are working on to ensure that we have enough Backing Gas but often times there is never enough. What we have utilized with help of our suppliers is a multi‐pack in a cage, this helps to transport the gasses easier as well we have more than enough.

Pipe Cleaning

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Pipe cleaning has become heavily scrutinized and the internal and external cleaning is being scrutinized extensively. It is important to understand that pipe is delivered all over the world and is subject to varying environmental conditions. At Pepco we deal with pipe systems that range from water treatment, oil and gas, heavy construction, as well as varying industries such
as mining.

Pipe systems are designed to transport commodities throughout a confined space while being under varying levels of pressure. Metals have natural properties that protect against corrosion and exposure to failure but without proper cleaning methods pipe lifespan can be dramatically reduced. On typical systems corrosion is the biggest culprit, but also there can be other defects
present.

What Makes Pepco Unique

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Pepco began business in 1981 as “Pipe End Prep Company” working primarily in Zaploc and Field Installation. Over the span of the 37 years Pepco has transformed into a one of a kind business in Nisku that can truly offer solutions to our clients from Start‐to‐Finish for their projects.

A major competitive advantage of Pepco pipe Services is by far the knowledge and customer focus of the employees. Pepco specializes in finding solutions for customers and we are not afraid to say when they can or cannot handle a project. With Over 400 customers in served Pepco continues to adapt and react to the ever‐changing Economic Landscape. Feel free to reach out to the team at Pepco to see how we can help you with your project!

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