![header thumbnail](/images/img-default-logo.png)
NS EN ISO 13704 : 2007 AC 2009
Current
The latest, up-to-date edition.
![header thumbnail](/images/img-default-logo.png)
PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - CALCULATION OF HEATER-TUBE THICKNESS IN PETROLEUM REFINERIES
12-01-2013
Foreword
1 Scope
2 Terms and definitions
3 General design information
3.1 Information required
3.2 Limitations for design procedures
4 Design
4.1 General
4.2 Equation for stress
4.3 Elastic design (lower temperatures)
4.4 Rupture design (higher temperatures)
4.5 Intermediate temperature range
4.6 Minimum allowable thickness
4.7 Minimum and average thicknesses
4.8 Equivalent tube metal temperature
4.9 Component fittings
5 Allowable stresses
5.1 General
5.2 Elastic allowable stress
5.3 Rupture allowable stress
5.4 Rupture exponent
5.5 Yield and tensile strengths
5.6 Larson-Miller parameter curves
5.7 Limiting design metal temperature
5.8 Allowable stress curves
6 Sample calculations
6.1 Elastic design
6.2 Thermal-stress check (for elastic range only)
6.3 Rupture design with constant temperature
6.4 Rupture design with linearly changing temperature
Annex A (informative) - Estimation of remaining tube life
Annex B (informative) - Calculation of maximum radiant section
tube skin temperature
Annex C (normative) - Thermal-stress limitations (elastic range)
Annex D (informative) - Calculation sheets
Annex E (normative) - Stress curves (SI units)
Annex F (normative) - Stress curves (USC units)
Annex G (normative) - Derivation of corrosion fraction and
temperature fraction
Annex H (informative) - Data sources
Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.