SPED Calgary Chapter
Unified Alloys Technical presentation
April 30,2014 – Belfry Gastro House,Calgary
Present: Unified Alloys Officers
Darren Hansen,Chief Executive Officer,Unified Alloys
Ross Morrison,Business Development,Unified Alloys
Mike Desrochers,General Manager,Unified Alloys
Calgary SPED Officers
Kevin Noakes,PPD IV ,President,SPED Calgary Chapter
Paul Bowers,PPD IV Director-At-Large,SPED Calgary Chapter
Bir S. Khangura,PPD III Secretary,SPED Calgary Chapter
41 people attended;29 members,4 former members,and 8 non members.
SPED Calgary Chapter President update:
SCC President Kevin Noakes opened the meeting at 5:45 pm by emphasising the need for members to renew their SCC membership annually and how to get required PDU’s to maintain their membership. SPED members should keep their contact info current so that the meeting attendance certificate can be emailed to them. SPED continues to provide incentives to members and will continue to terminate membership of expired members. Speaking about the upcoming SCC events,Kevin noted that SCC Director-at-large,Clearance Wynter,of AMEC Oil &Gas Canada,will provide a technical presentation about requirements on construction sites for site piping technical support at the next SCC AGBM and that the next meeting will feature a Cadworx technical demonstration provided by CodeCAD in June with details to follow.
Featured Technical Presentation by Unified Alloys:
Ross Morrison and Mike Desrochers,Unified Alloys Senior Technical Sales Representatives and Darren Hansen,Unified Alloys CEO , provided the SPED Calgary Chapter with the featured technical presentation focused on Stainless and Alloy Steel.
Meeting Agenda: 1. Safety Moment
2. Unified Alloys overview
3. Stainless steel Basics
4. Chrome-Moly Alloy Basics
5. Piping &Instrumentation Components
6. Liquid Oxygen,Gaseous Oxygen and Cryogenic Materials
7. Cryogenic pipe supports,guides and anchors
8. Quality Control:Positive Material Identification
9. Handling &Storage of Stainless Steel
10. Corrosion Issues – Stainless Steel
11. Question Session
Unified Alloys Chief Executive,Darren Hansen,provided the safety moment about planning and managing a road trip. The more planning you do in advance,the more likely you are to have a safe and successful journey.
Unified Alloys overview
Established in 1976,Unified Alloy is 100% Canadian,ISO 9001:2008 certified company. With strategic service and stocking locations across Canada,Unified Alloys provides Piping and Instrumentation Products and solutions and is a pre-qualified supplier for many resource owners and EPC companies.
Stainless Steel Basics
Stainless steel,produced by using different concentrations of alloying elements,is known for relatively high strength,good corrosion resistance,and ductility. Stainless Steel has five different metallurgical structures (austenitic,ferritic,martensitic,precipitating hardening and duplex) each having different characteristics is created for different applications.
Stainless steel is created when the element of chromium is added at a min. of 10.5% to the iron and carbon. Chromium produces a rapidly self-repairing invisible inert film also known as “passive layer” in the presence of oxygen as a thin layer of oxide that quickly repairs damage.
Chrome-Moly Alloy Basics
Chromium molybdenum alloy steel is an alloy steel intended for high temperature and high pressure services because of its strong resistance to rupturing at high temperatures and high pressures. It is mainly used in the power generation and petro-chemical industry because of its tensile strength,corrosion resistance,high temperature strength and resistance to cracking from hydrogen attack and hot sulfide corrosion cracking.
Piping &Instrumentation Components
Unified alloys supplies industrial tubing,fittings,valves,regulators,manifolds,double block &bleed valves,multitube/ pre-insulated bundle.
Double block and bleed:Double block and bleed valves come as Hi-Pro,Pro-block and Monoflange valves. Smaller footprint,improved safety,reduced labor &maintenance,reduced load &vibration in process,and integral (Tru-loc) connections are some of the features of double block and bleed valves.
Mono flange is much smaller and lighter. Hi-Pro has the option of NPT connections. Pro-Bloc has the option of using ball/ needle valves as well as sample probes.
Glycol Heat tracing
Glycol heat tracing system transfer heat by using a series of pipes in a closed loop circulation system. The heat trace tubing runs in a loop next to the pipe that requires heat and the transfer of heat takes place by movement of fluids. The different types of tubing manufactured by Unified Alloys are Temptube,Light Trace,Heavy Trace,Self-regulating low temperature heated bundles,continuous steam purge bundles.
The glycol heat tracing system consists of:
a) Boilers to supply heat
b) Heat exchanger from a main heat reservoir
c) Circulating pump
d) Expansion tank
e) Specialty valves and controls
Liquid Oxygen,Gaseous Oxygen and Cryogenic Materials
Liquid Oxygen service:cannot be contained in carbon steel or low alloy steel but can be in stainless steel,copper and its alloy,nickel and its alloys,brass bronze,silicon alloys,monel,Inconel and beryllium.
Gaseous Oxygen materials:The austentic grades (300 series) of stainless steel have higher resistance to ignition than carbon steel,however,stainless steel,once ignited,burns more rapidly than carbon steel.
Cryogenic Materials:require suitable mechanical properties at transition temperatures. Stainless steel alloys 304/l and 316/l are commonly used having better thermal expansion and lower temperature properties than carbon steel,that cannot be used due to embitterment.
Cryogenic pipe supports,guides and anchors
When designing insulated pipe shoes,standard procedure is based on an analysis of load requirements and temperature details. Cryogenic pipe supports,guides and anchors are designed to minimize thermal conduction. Taking into account warm-up and cool down loads,piping flexibility analysis is necessary. Expansion and contraction of material supports must be capable of accommodating movements. Also PTFE slide plates are used to minimize forces caused by friction.
At Unified Alloy,the evaluation process begins with the distribution and receipt of a completed Vendor Qualification Data Collection Form. The procurement department reviews the documentation and forwards it to the Quality department for further review and approval.
Minimum documentation includes:
• Evidence of an implemented Quality Management System
• Product accreditations such as ASME,ASTM,MSS,etc.
• Canadian Registration Number (CRN –when applicable)
• Company and product literature
• Sample Material Test Reports
• Samples of specific material
The initial order with a new vendor undergoes a stringent quality inspection,this may include,depending on the product:
• Positive Material Identification (PMI) NDE inspection
• Material Dimension Inspection (e.g.,thickness,ovality,length)
• Data and Documentation Review
Depending on the results of the inspection,the vendor is added to the Approved Vendors List or provided a second trial order opportunity or rejected.
Handling &Storage of Stainless Steel
• Procedure SOP-007
• Requires separation of alloy and carbon products
• A Barrier protection on handling and storage equipment that may come in contact with alloy products
• No SS/A material stored directly on the ground
• Handling techniques &equipment employed to prevent injury to people and inadvertent product damage
• Alloy and carbon never shipped together in a crate
• Barrier protection between banding and pipe
• Mechanical damage (e.g.,scratches and gouges) can occur easily during handling if not guarded against.
• Mechanical damage will result in the passive oxide film being “punctured” leading to a possible lower resistance to the initiation of corrosion than the surrounding chemically passive surface.
• Carbon steel particles embedded into Stainless Steels that are not removed can lead to pitting corrosion.
Stainless Steel Corrosion Issues
Main causes of corrosion are:
• Saliferous / Brackish Water Environments
• Sour Gas Environment
• Surface Contamination
• Presence of Crevices
• Improper Alloy Selection
• Microbial Action
• Galvanic / mixing dissimilar materials
Types of corrosion:
• Pitting corrosion:a form of galvanic corrosion,in which chromium is dissolved and failures can occur. In the case where carbon steel contamination is not removed,galvanic corrosion can occur. The residual solution from the carbon steel “rusting” in the pit turns to FeCl3,which is corrosive to stainless steel.
• Stress corrosion cracking:Under the combined effects of stress and certain corrosive environments stainless steels can be subject to this very rapid and severe form of corrosion. The most damaging environment is a solution of chlorides in water,such as sea water,particularly at elevated temperatures.
After the presentation a question session was opened for the audience. Darren Hansen and Ross Morrison answered interesting questions put to them by some of those attending the presentation.
Kevin Noakes,President of SPED Calgary Chapter,thanked Darren Hansen,Ross Morrison and Mike Desrochers for arranging the presentation for the SPED CC meeting and for all those who attended and adjourned the meeting at about 8:00 p.m.
May 1st,2014 | Category:SPED Event