Isn't the CRR based on the actual remaining wall thickness at the root of the 
first exposed thread outside of a fitting? So if you're not threading it, it 
should theoretically have a CRR greater than 1.0. Also, I believe the term 
Standard wall pipe in 10" diameter refers to schedule 30.

Mark at Aero
602 820-7894

Sent from my iPad

On Aug 11, 2017, at 5:49 AM, Mike Stossel 
<<>> wrote:

It has always been my understanding that the corrosion resistance ratio 
benchmark of (1) is based on threaded schedule 40 steel, so I believe any other 
pipe type would have a better or worse ratio, but not the same.

Mike Stossel SET
36 Barren Road
East Stroudsburg, PA 18302
Office: 973-670-2627<>

From: Sprinklerforum [] On 
Behalf Of Dewayne Martinez
Sent: Friday, August 11, 2017 8:39 AM
Subject: 10" pipe with 1.0 CRR

Anyone know of 10in non-sch40 pipe that has a CRR of 1?  Have a project where 
the EOR is insisting on this.  They also have a 100lb maximum point load per 
hanger…..but that is a conversation for another day!

Dewayne Martinez
Fire Protection Design Manager

TOTAL Mechanical
Building Integrity
W234 N2830 Paul Rd.
Pewaukee, WI  53072<>
Ph:  262-522-7110
Cell: 414-406-5208


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