Chemical Engineering July 2016 - 7

Letters
ing of the following materials at a minimum design
metal temperature, if used, under the following requirements:
Specified
Minimum
Tensile Strength
ksi (MPa)
Average Impact
Value for Three
Specimen ft-lbf (J)
65 (448) and lower (for example,
A/SA 106, 53, 234 WPB)
>65 (448) to 75 (517) (for
example, A/SA 105)
>75 (517) to 95 (656)
13 (18)
15 (20)
20 (27)
Minimum Impact
Value for One
Specimen ft-lbf (J)
10 (14)
12 (16)
15 (20)
2. Or control the Mn/C ≥ 5 and control grain size to 7
or finer (grain size of 8 or finer for A350 Gr.LF2, Cl.1)
and limit V, Ti, Nb to ASTM A20 limits and B to 5 ppm
maximum.
3. Or select an acceptable alternate material, such as the
following, which includes impact testing:
a. Forgings/Fittings: ASTM/ASME A420 Gr. WPL6 (having
a grain size of 8 or finer)
b. Flanges: ASTM/ASME A350 Gr.LF2, Cl.1 (Charpy
performed on coupon taken from hub having a grain
size of 8 or finer)
c. Pipe: ASTM/ASME A333 Gr. 6 (having a grain size of
8 or finer)
4. In your company's procurement documents for CS
forged fittings, flanges and pipe, request a copy of the
MTR [mill test report] for each heat of material.
5. In procurement, request MTR results of impact testing
of each heat of material meeting the above values
or values in accordance with the material standard
when included.
6. In procurement, request that the MTR include the material's
Mn/C ratio indicating that it is ≥ 5.
Finally, my thanks to Barry Messer, Fluor Corp., who
took the time to present such a vital topic at the spring
2016 ASME B31.3 Process Piping code meeting in Seattle.
Acknowledgement and appreciation also goes to
John Houben, Exxon-Mobil (corporate.exxonmobil.com),
as well as the Materials Technology Institute (www.mtiglobal.org/)
who has pulled together a team of experts
that have been leading the charge on this effort.
Bill Huitt
President, W.M. Huitt Co., St. Louis, Mo.
Editor's note: The above letter is an excerpt of the full letter that can be found on www.
chemengonline.com
Postscripts,
corrections
May, 2016, " This drum
dumper is dust tight " , p.
34. The photo of the drum
dumper is incorrect in the
print edition. The correct
photo is shown here:
Multitasking
with system
- Stable, lightweight and durable
- Froom 0.1 L to 2000 L
- From 80 mm to 1200 mm diameter
- Lidded drums and drums with
bungs, cylindrical and conical
- Polished surfaces for optimum
product discharge
- GMP pharma standard
- Modular design
Müller GmbH - 79618 Rheinfelden (Germany)
Industrieweg 5 - Phone: +49(0)7623/969-0 - Fax: +49(0)7623/969-69
A company of the Müller group
info@mueller-gmbh.com - www.mueller-gmbh.com
Circle 08 on p. 62 or go to adlinks.chemengonline.com/61497-08
Call the
Solids Mixing
   
 
  
(also for high-viscosity mixing)
Size Reduction
    
    
    
Vacuum Drying
   
for all your solids processing
Experts
Applications:
  
  
  
 
  
  
  
   
    
Drums and Containers
I
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tio
n
Flexicon
chemical engineering www.chemengonline.com
www.pauloabbe.com 855-789-9827 sales@pauloabbe.com
Circle 09 on p. 62 or go to adlinks.chemengonline.com/61497-09
july 2016
7
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http://www.mueller-gmbh.com http://adlinks.chemengonline.com/61497-08 http://corporate.exxonmobil.com http://www.mti http://www.global.org/ http://www.chemengonline.com http://www.pauloabbe.com http://adlinks.chemengonline.com/61497-09 http://www.chemengonline.com
Chemical Engineering July 2016

Table of Contents for the Digital Edition of Chemical Engineering July 2016
