Featured Story

Take Some Basic Steps With A Caustic System

Recent tube failure should spur addressing several issues

basic steps with caustic system mn

 We circulate 50% caustic through the tubes of a vertical 1-1 shell-and-tube condenser using 50% steam reduced from 400-psig steam. The exchanger contains 60 tubes, each ½-in. diameter with 0.083-in. walls, but 20 have been blocked off. The caustic enters the bottom of the exchanger and, after exiting, dumps into the top of a storage tank. Regular deliveries ensure that tank is seldom below 75% full. A 3-in. globe valve controls the steam flow. The worst-case ambient temperature is -15°F.Recently, after almost a decade of service, a single 316L stainless steel tube failed, causing caustic to flow into the condensate return pump. An inspection revealed no fouling in…

Full Story

Don't Miss These Online Exclusives

2019 Supplier Source Guide

CP1812S GuideCover 120x160 copyAn easy-to-use guide to help locate suppliers to the chemical, petrochemical and refining industries. It lists suppliers in 43 categories of equipment, products, services and software. Check it out.

2019 webinars2

Webinars

Myriad chemical-industry topics delivered 60 minutes at a time. Check them out.

 

Comical Processing Cartoon

190103 cartoon 100 120Our pal Jerry King, award-winning artist, provides the cartoon. We want you to pen the funny captions. Submit your caption now.

 

AskTheExperts sm

Ask the Experts

Tap authorities on a wide variety of processing-related subjects, and read answers to hundreds of questions. Ask the experts.

Most Recent

  • Take Some Basic Steps With A Caustic System

     We circulate 50% caustic through the tubes of a vertical 1-1 shell-and-tube condenser using 50% steam reduced from 400-psig steam. The exchanger contains 60 tubes, each ½-in. diameter with 0.083-in. walls, but 20 have been blocked off. The caustic enters the bottom of the exchanger and, after…

    Full Story
  • Consider Flow Regime’s Impact On Sample Analysis

    By Randy Rieken, Swagelok Co.

    Fluid within the lines of an analytical sampling system exhibits one of two flow patterns — laminar or turbulent (Figure 1). Each type highly depends on the velocity of sample fluid as well as the fluid’s density and viscosity. It’s important to know the type of flow to expect when designing…

    Full Story
  • U.S. Chemical Industry Soars

    By Kevin Swift and Martha Gilchrist Moore, American Chemistry Council

    Economic growth in the United States remained dynamic at the end of 2018 with gains in manufacturing double what they were a year ago. However, all the world’s other major economies have slowed, ending a rare period of synchronized expansion.In the United States, business investment is on the…

    Full Story
  • Better Understand Boilers

    By Amin Almasi, mechanical consultant

    Steam finds wide use in chemical processing for applications ranging from heating fluids to driving equipment. The boilers that generate this steam from water come in many different varieties and sizes. So, here, we’ll look at the types and designs of boilers for process plants, as well as issues…

    Full Story
  • 3D Printing Adds A New Dimension To Process Equipment

    By Seán Ottewell, Editor at Large

    3D printing now boasts costs and technology that’s allowing it to make an impact on chemical industry equipment and operations. Stefan Guertzgen, global senior director industry solution marketing and communications for chemicals, SAP, Newtown Square, Pa., points to three primary developments…

    Full Story
  • Take The Pressure Off Troubleshooting

    By Andrew Sloley, Contributing Editor

    Process engineers always want more instruments. However, project managers invariably balk at the cost, especially for devices not needed when an operation is running right. The usual compromise leads to a mix of instruments (some tied into the control system and others purely for local indication)…

    Full Story

Latest Products