Invar (Fe-36Ni) Piping - pressure/temperature design parameters

[LSThill]

Team Member Need the following:

CODE: NFPA59A - Chapter 6, Piping LNG Material: Invar (Fe-36Ni)
Piping - pressure/temperature design parameters and the insulating properties of Microtherm at low temperatures

Leonard@thill.biz

 

[unclesyd]

Isthill,

I will imagine you will have to contact Microtherm for this data. We used it but only at high temperatures. the have an office in the US. My data sheets don't go below 0°C.

http://www.microtherm.uk.com/index.html

Here is your standard at what seems to be a reasonable price.

http://www.nfpa.org/catalog/product.asp?pid=59A01&src=catalog target=_top

 

[ApC2Kp]

To LSThill,
While searching for something else, came across reference to Invar36. It is older info and probably has more recent ASTM data. Originally product of Carpenter Tech, UNS K93601 to ASTM A-333. UTS= 65 ksi, SY= 40 ksi E=20.5E6 psi elongation 35% density 0.291 lb/in3, thermal conductivity 6.05 Btu/ft-hr-degF. There was also info for modified INVAR36 (with 3% Mn, 1% Ti) to proposed ASTM A-334 .
There was not a B31 Code allowable for Invar36, so you might have to set your own SA. Is there a particular application for the Invar36 in cryogenic service, or is it for a system of components ?

 

[LSThill]

Team Member

Purpose: Invar (Fe-36Ni) LNG to be included the following ASME CODE:

· ASME B31.3-2002 PROCESS PIPING - ASME CODE FOR PRESSURE PIPING, B31 An American National Standard

· ASME B16.5-2003 Pipe Flanges and Flanged Fittings NPS ½ Through NPS 24 Metric/Inch Standard, An American National Standard


Scope: NEW ASME CODE CASE so the material property and stress range can be included:

· ASME B31.3 PROCESS PIPING - ASME CODE FOR PRESSURE PIPING, B31 An American National Standard

TABLE A-1 (CONT'D)

BASIC ALLOWABLE STRESSES I N TENSION FOR METALS1

Numbers in Parentheses Refer to Notes for Appendix A Tables; Specifications Are ASTM Unless Otherwise Indicated

· ASME B16.5 Pipe Flanges and Flanged Fittings NPS ½ Through NPS 24 Metric/Inch Standard, An American National Standard

Table 1A List of Material Specifications



Attention: Production Engineering Sect. LNG Technology Team



Request for Invar (Fe-36Ni) ASME B31.3 Code Case technical information or have your conducting a major testing protocol on this material Invar (Fe-36Ni) LNG design and results

AND OR EQUAL TO THE TABLE A-1 (CONT'D)

BASIC ALLOWABLE STRESSES I N TENSION FOR METALS1

Numbers in Parentheses Refer to Notes for Appendix A Tables; Specifications Are ASTM Unless Otherwise Indicated

Invar (Fe-36Ni) ASME B16.5 new pressure/temperature design parameters

AND OR EQUAL TO Table 1A List of Material Specifications

Approved Piping Classification Specification Invar (Fe-36Ni) .require pressure/temperature design parameters; Size’s range, and available of Piping, Nipple, Fitting, Valve, Flange, Material.

Cost for Pipe Size’s range: 1 inch – 36 inch dia., and available of Piping, Nipple, Fitting, Valve, Flange, Material.

Please Help

Leonard Thill
Leonard@thill.biz