Handling Compound Valve and Multi-Valve platforms in P&IDs and SOPs

I was at the IIAR convention a few weeks ago which afforded me the opportunity to do something I’ve long wanted to do: Get a chance to ask representatives from Danfoss, Hansen and R/S Parker to give me their thoughts on properly labeling Compound Valve and Multi-Valve platforms.  I am going to use the Danfoss valves as an example for this article, simply because I have lots of diagrams and pictures around based on past experience with them.

A pair of Danfoss ICF valve stations

The idea of all of these platforms is that you basically get a valve-station in a single valve body. The valves take up less room, require less welding, etc. I don’t have any arguments with any of that: my issue is how I am seeing them referenced on a P&ID and in SOPs.

Let me give you an example:

The valve we are going to talk about is a Danfoss ICF-32-6-3A. It is a fairly common configuration replacing a traditional liquid valve-train.

Schematic of the valve

What I am seeing in the field is that this is represented in the field on the P&IDs as something like this:


In this situation, the entire compound valve is represented by a single tag. This results in SOP steps like this:

1) Close the liquid stop valve on ICF-AU1-01.

That step requires the operator to figure out which of the valves is the liquid stop valve. The correct answer is the first module or M1. We could write the stop to say so explicitly:

1) Close the liquid stop valve (Module 1) on ICF-AU1-01.

However, this step still requires the operator to identify the module. Most of the multi-valves have the Module (or port) number stamped on the valve but paint and insulation could get in the way of that.

What I would prefer to see is a more traditional valve labeling/tagging where each valve module/port is explicitly labeled/tagged. One way to do this while keeping with the same type of P&ID display is as follows:


This would let us change the SOP step to something like this:

1) Close the liquid stop valve on ICF-AU1-01-M1.

Of course, we could always reference each component of the valve with the more traditional names and tags such as :

  • HV-AU1-01 : Hand Valve (Stop in this case) on the air unit.
  • ST-AU1-02 : Strainer on the air unit.
  • LSV-AU1-03 : Liquid Solenoid on the air unit.
  • CKV-AU1-04 : Checkvalve on the air unit.
  • HXV-AU1-05 : Hand Expansion valve on the air unit.
  • HV-AU1-06 : Hand Valve on the air unit.

This might clutter up the drawing a bit, but something like this would be perfectly acceptable as well:


 Whichever method you choose, the performance basis is going to be what your operators understand. When introducing these new types of valves, a little bit of training and employee participation goes a long way!

Posted in General Information | Leave a comment

$205,000 fine for dumping 40 pounds of ammonia

Kodiak fish processor North Pacific Seafoods pleaded guilty Tuesday in federal court to illegally dumping ammonia into the Kodiak city sewer, while the processor’s chief engineer faces charges of his own.
District Court Judge Ralph Beistline imposed $205,000 in criminal penalties, $55,000 of which should go to the city for “hazardous waste response training” and equipment for sewer and fire department employees, according to an Alaska U.S. Attorney’s Office press release.

Kodiak fish processor North Pacific Seafoods pleaded guilty Tuesday in federal court to illegally dumping ammonia into the Kodiak city sewer, while the processor’s chief engineer faces charges of his own.
District Court Judge Ralph Beistline imposed $205,000 in criminal penalties, $55,000 of which should go to the city for “hazardous waste response training” and equipment for sewer and fire department employees, according to an Alaska U.S. Attorney’s Office press release…

…According to Assistant U.S. Attorney Andrea Steward, the illegal disposal happened in late November 2011. Employees at Alaska Pacific Seafoods “dumped approximately 40 pounds of ammonia waste from its refrigeration system” into the sewer.

–Alaska Dispatch

That’s about $5,000 a pound! The article goes on to say that the chief engineer that directed the dumping is facing a charge for violating their DEC regulated permit.

Please make sure you have a plan in place to deal with Ammonia before you run the risk of finding yourself in this situation!

Posted in Community Involvement, Compliance, EPA, Incidents | Tagged , , | Leave a comment

Lessons Shared #1 – “The Graveyards are full of Heroes”

I had to fight back tears the first time I read this NIOSH report. Having lived on a family farm for a short period, it was very easy for me to imagine the reaction of the people involved…

A 43-year-old dairy farm owner (victim #1) and his 23-year-old son (victim #2) died from asphyxiation after entering one of two adjacent 8-foot-deep manure-waste pits that were connected by a tunnel. The pits were located under each half of the end of a dairy holding barn and were connected so that both pits could be pumped from one side. The incident was unwitnessed but evidence suggests the following sequence of events. The two victims were pumping the manure from the pit into a manure spreader tank using a pump located outside the barn that was being driven by a tractor’s power take-off. The workers had pumped the manure from the pit containing the pump intake hose; however, the manure from the adjacent pit could not be pumped because the tunnel connecting the pits was obstructed. The father removed a steel grate cover and descended an aluminum ladder into the nearly empty pit. As he began to clear the tunnel of obstruction, the father was overcome. The son entered the pit in an attempt to rescue his father and was also overcome. The victims were discovered 22 hours later by the farm owner’s wife, and the mother of the 23-year-old victim.

There are many lessons we can learn from this incident – even though it isn’t an Ammonia process, let alone a PSM covered process, but the primary one I’d like to talk about is human nature.

It’s human nature to try and help when you see a co-worker in trouble. I think it’s even more common in the blue-collar skilled trades than in many other lines of work: we are “get ‘er done” types of people. We’re used to solving problems on the fly. We’re confident we can work our way out of little jams.

What we have to be wary of is letting our heart over-rule our brain. You’re more likely to add to the body/injury count than you are to help if you don’t stop and think about what you are going to do. Here are some other examples:

  • A 31-year-old male assistant construction supervisor (victim) entered an oxygen-deficient manhole to close a valve and collapsed at the bottom. In a rescue attempt a labor foreman (male, age 34) and the victim’s supervisor (male, age 36) also entered the manhole and also collapsed. All three workers were pronounced dead at the scene by the county coroner. (report)
  • A 25-year-old male electroplater (victim) died after entering a metal plating vat he was cleaning. Four male co-workers also died when they entered the vat in rescue attempts. (report)
  • A 31-year-old male dairy farm laborer entered a manure pit to clear a pipe, lost consciousness, and collapsed at the bottom. In a rescue attempt, his 33-year-old brother, also a farm laborer, entered the pit, lost consciousness, and collapsed. Both workers (hereinafter referred to as initial victim and rescuer victim) were pronounced dead at the scene. (report)
  • A 43-year-old production foreman of a wire processing company was summoned to aid a maintenance crewman (his son), who had collapsed at the bottom of an open top clarifying tank. The 18 year-old summer employee had been overcome by fumes liberated from chemical sludge that he was removing from inside the tank. In a rescue attempt the production foreman collapsed upon entering the tank. He was later removed from the tank. by the fire/rescue team and pronounced dead. The fire/rescue team also removed the crewman. He was admitted to the intensive care unit of a local hospital and later released. (report)
  • Two workers died while attempting to rescue a third worker who had entered a fracturing tank at a natural gas well. A total of four men entered the. tank and were overcome by natural gas. The two workers who died drowned in 30 inches of liquid (water, gas, acid, and possibly oil) which had been released into the tank during “blow down” procedures. The other two workers, both rig hands, required medical treatment at local hospitals. (report)

Please use these stories to talk to your maintenance staff about the VERY REAL hazards of acting “in the moment” in an attempt to rescue their coworkers. Hopefully these stories hit home and if they find themselves in similar situations, they may take some time to consider their actions before their rescue attempt inadvertently results in another of these sad stories.

Posted in Culture, Incidents, Operator Training, Training | Tagged , , | Leave a comment

The “PSM Lessons Shared” project

Recently, during a PSM class, I had a student with an all-too-common issue: How do I change the incident reporting culture at my facility? As a new PSM coordinator he was struggling because he couldn’t get his operators to report any incidents or near-misses that occurred on the process. We discussed it as a group for a while because changing safety culture is one of the most difficult things you will ever attempt.

It helps if we start with a common definition of culture. “A way of thinking, behaving, or working that exists in a place or organization” is the Merriam Webster dictionary definition that seems to apply best to safety culture. When dealing with culture, it’s good to keep in mind this Tony Robbins quote as well: “It’s not what we do once in a while that shapes our lives, but what we do consistently.”

Your safety culture is the result of the consistent actions and experiences that your company has provided for its employees. This kind of deeply established culture isn’t going to change just by issuing a new corporate policy. It’s likely that your safety culture has built up over years.  Culture has inertia and you shouldn’t expect to counter-act that overnight. If you are to have any chance of changing it, you have to first understand what has caused this culture to form.

In this particular case, it became clear that the culture of not reporting incidents was due to a past practice of criticizing and punishing anyone who reported an incident. It’s a fundamental principle of human nature that we get more of something we reward and less of something we punish. The culture of not reporting incidents can only be changed by changing the perception that negative things will occur if you share your incident with your colleagues and management.

It’s going to take time and careful attention to change such a culture.  For this case, he wanted something low key – something that wouldn’t seem like an overt attempt at changing culture because the employees were instinctively resistant to any type of direct change. How could we begin to change the culture for this student? We decided to attempt to change the culture – not by changing the culture directly – but by changing the perceptions and values of the employees through consistent action on the part of the PSM coordinator. He is going to share incidents from other facilities in the hopes that they start a conversation about similar situations in the plant. If such discussions do occur, he is going to focus the conversations ONLY on the lessons we can learn from the incidents, rather than trying to assess blame or fault.

This is such an interesting idea to me that I decided to help him out. Over the next year, I will provide a monthly post about a single incident relevant to Ammonia PSM so that they can discuss it and learn from it. We’re hoping that just the act of discussing these situations will make the facility more comfortable with the failings of human nature. Hopefully, they will begin to understand the value of incident investigation and the reporting rate will naturally change in response to the changing perception of the value of incident investigation.

If you have any PSM incidents that you would like to share (even anonymously) please email them to me at ammoniapsm@gmail.com

Look for the first of these monthly incident posts in the next few days. I look forward to the reports concerning the culture change (if any) over the next year and I will keep you updated as well.

Posted in Culture, General Information, Incidents | Tagged , , | Leave a comment

Should you challenge OSHA citations?

Will Kramer has written an excellent article on why you should challenge OSHA citations.

Based on an analysis of the more than 57,000 citations listed in OSHA’s public inspection databases in 2012, employers achieved an average penalty reduction of 49% by negotiating their citations with OSHA at informal conferences. Of the 33,765 citations of this type, 7% were deleted entirely. This is a victory as the complete elimination of a citation is typically an employer’s primary goal, since that effectively clears the employer’s record in the event of future inspections, which could otherwise result in costly repeat citations.

I’ve had very good luck with informal conferences. Be prepared. Know the law. Know the RAGAGEP.

Posted in Compliance, OSHA | Tagged , | Leave a comment

H.R.1648 – Protecting America’s Workers Act

Rep. Miller, George [D-CA-11] has introduced legislation to revise the OSHA penalty structure. There are some interesting changes in this legislation:

  • Repeat Violations – Increased from $70,000 to $120,000
  • Serious Violations – OSHA has requested increase from $7,000 to $12,000.
  • Built in inflation adjustment for penalty amounts
  • Requirement of reporting of fatalities and hospitalizations of 2 or more employees (currently 3)
  • 5 years imprisonment for a 1st offence violation that causes or contributes to serious bodily harm to any employee but does not cause death to any employee – 10 years for subsequent offences
  • 10 years imprisonment for a 1st offence violation that causes or contributes to the death to any employee – 20 years for subsequent offences
  • Increases federal oversight of state OSHA plans
  • Increases whistle-blower protection
  • Allows multiple general duty citations – one for each affected employee

These would be massive changes to the enforcement of the OSHA rules.

You can read the bill at this link.

Posted in Compliance, OSHA | Tagged , | Leave a comment

IIAR 2 and IIAR 4 up for public review

IIAR Standard 2 (Safety Standard for Equipment, Design, and Installation of Closed-Circuit Ammonia Mechanical Refrigeration Systems) and IIAR Standard 4 (Installation of Closed-Circuit Ammonia Mechanical Refrigeration Systems) are available for public review on the IIAR website.

While being an IIAR member is always a good idea, you do not have to be a member to download or comment on these proposed standards.

Posted in Good Engineering Practices | Tagged | Leave a comment

CSB Releases Safety Video on 2009 Fatal Blast at NDK Crystal – Animation Depicts Stress Corrosion Cracking; Vessels Were Not Inspected or Tested

Today the CSB issued a report on a 2009 vessel failure that it blamed on Stress Corrosion Cracking. There are some interesting lessons to be learned about incident investigation in this report since the mechanism that led to the vessel’s failure was identified years before due to a smaller failure in the vessel lid.

Since this is actually an issue for Ammonia Refrigeration Systems, I wouldn’t be surprised if this means the Stress Corrosion Cracking issue comes back into the revolving Chemical NEP questions.

You can learn more about SSC in IIAR2 Appendix J, which defines it as follows:

Stress corrosion cracking (SCC) is a generic term describing the initiation and propagation of cracks that can occur in metals when subjected to stress in the presence of an enabling chemical environment. The stress can originate from an externally applied force, thermal stress, or residual stress from welding or forming.

You should read the entire appendix, but one thing you want to do for sure is ensure that oxygen is not available inside your system. You can do this through proper evacuation during commissioning / maintenance and checking for non-condensables routinely. It also recommends that your vesels are post-weld heat treated, but that’s something you can’t do after they are installed.

Link to the CSB report: http://www.csb.gov/assets/1/19/CSB_CaseStudy_NDK_1107_500PM.pdf

Link to the CSB video: http://www.youtube.com/embed/uo7H_ILs1qc

Posted in Community Involvement, CSB, General Information, Good Engineering Practices, Incidents | Tagged , , , | Leave a comment

EPA goes after a cold storage, the real estate agent AND the customer leasing the space!

Complainant issued a Compliance Order to Respondent, and also to Quirch Foods Caribbean, Corp., and Caparra Realty Associates, LLC ( “the Order”) pursuant to Section 1 13 of the Act regarding the Facility. The Order required these parties to perform certain activities at the Facility including the performance of repairs to the ammonia equipment. Complainant issued a Compliance Order to Respondent,and also to Quirch Foods Caribbean, Corp., and Caparra Realty Associates, LLC ( “the Order”) pursuant to Section 1 13 of the Act regarding the Facility. The Order required these parties to perform certain activities at the Facility including the performance of repairs to the ammonia equipment.


Essentially, they issued general duty citations to the company that was actually operating the facility, but they also ordered the Real Estate company and the CUSTOMER of the cold storage (that was leasing the cold space) to ensure that they fixed the compliance issues.

I would imagine this will increase the customer oversight of Regulatory Compliance quite a bit.

Here’s the actual settlement agreement.

A tip of the hat to Bryan Haywood for covering this on his site.

Posted in Compliance, EPA, General Information, Inspections | Tagged , , | Leave a comment

NRC Call – When is it necessary? When is it a good idea?

Most people involved with Ammonia Refrigeration understand that if we have an unintentional release of ammonia in excess of 100 pounds over a 24hr period, we have to report it to the National Response Center (among others) immediately or face substantial fines. These fines can be very large

Because of this, I’m getting reports that some companies are requiring their employees to report EVERY release, no matter how small. Usually this is in response to a citation at one of their facilities for not reporting a release that was clearly over 100 pounds in a timely manner.

While I’ve long counseled that companies should report EVERY release that the REASONABLY believe is near 100 pounds, I think the idea of reporting nuisance leaks (packing leaks for example) that are CLEARLY below 100 pounds, is unwise and it’s very possible that someone is going to ask: “Why is ABC company having so many leaks?” followed shortly thereafter by “Perhaps we should send a referral to the EPA or OSHA to make sure everything is OK!”

Reporting leaks that clearly are not going to involve a release of 100 pounds over a 24 hour period is just asking for trouble. Companies with these policies should reconsider them.

Posted in Community Involvement, Compliance, EPA, Incidents | Tagged , , | Leave a comment