AS 2885.1 Pipeline Collapse Pressure

Calculate AS 2885.1 pipeline collapse pressure and collapse water depth for wet pipeline sections.

Collapse pressure checks are only required for wet pipeline sections, or other cases where external pressure is applied.

Reference : Australian Standard AS 2885.1 : Pipelines - Gas And Liquid Petroleum Part 1 : Design And Construction (2015)

Change Module :

AS 2885.1 Gas And Liquid Pipeline Schedule Calculation Module
AS 2885.1 Pipeline Allowable Stress Calculation Module
AS 2885.1 Pipeline Bend Thickness Calculation Module
AS 2885.1 Pipeline Bolt Torque Calculation Module
AS 2885.1 Pipeline Branch Reinforcement Calculation Module
AS 2885.1 Pipeline Cold Bend Buckle Calculation Module
AS 2885.1 Pipeline Combined Stress Calculation Module
AS 2885.1 Pipeline Design Pressure Calculation Module
AS 2885.1 Pipeline Fatigue Stress Calculation Module
AS 2885.1 Pipeline Fluid Velocity And Flow Rate Calculation Module
AS 2885.1 Pipeline Fluid Volume And Mass Calculation Module
AS 2885.1 Pipeline Fracture Toughness Calculation Module
AS 2885.1 Pipeline Hoop Stress Calculation Module
AS 2885.1 Pipeline Hydrotest Pressure Calculation Module
AS 2885.1 Pipeline Local Pressure Calculation Module
AS 2885.1 Pipeline Mass And Weight Calculation Module
AS 2885.1 Pipeline Maximum Velocity Calculation Module
AS 2885.1 Pipeline Road And Rail Crossing Calculation Module
AS 2885.1 Pipeline Wall Thickness Calculation Module
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More Pipeline Collapse Pressure Modules

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Links : ±

CALCULATOR : AS 2885.1 Section 5.4.5 Pipeline External Collapse Presssure [PLUS] ±

Calculate pipeline external collapse pressure and collapse water depth from wall thickness and ovality (AS 2885.1 section 5.4.5).

Collapse pressure is calculated from the elastic collapse pressure and the plastic collapse pressure. The AS 2885.1 ovality factor is equal to two times the API ovality factor.

Tool Input

schdtype : Pipe Schedule Type
diamtype : Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
ttoltype : Fabrication Tolerance Type
- xu : User Defined Negative Wall Thickness Fraction
- Hu : User Defined Negative Wall Thickness Allowance
syutype : Stress Table Type
mattype : Yield Stress Type
- SMYSu : User Defined Specified Minimum Yield Stress
satype : Allowable Stress Calculation Type
- Fdu : User Defined Allowable Stress Factor
- Sau : User Defined Allowable Stress
modptype : Pipe Material Type
- νu : User Defined Pipe Poisson's Ratio
- Eu : User Defined Pipe Elastic Modulus
ρe : External Fluid Density
G : Corrosion Allowance
fo : Ovality Ratio

Tool Output

ν : Poisson's Ratio
Dm : Mid Wall Diameter
E : Young's Modulus
Fd : Allowable Stress Factor
H : Wall Thickness Fabrication Allowance
ID : Pipe Inside Diameter
OD : Pipe Outside Diameter
OD/tn : Pipe Diameter Over Wall Thickness Ratio
Pc : Collapse Pressure
Pel : Elastic Collapse Pressure
Py : Plastic Collapse Pressure
SMYS : Yield Stress
Sa : Allowable Stress
Wc : Collapse Water Depth
tm : Minimum Fabrication Wall Thickness
tn : Nominal Wall Thickness
tw : Pressure Design Wall Thickness
x : Wall Thickness Fabrication Fraction

CALCULATOR : AS 2885.1 Section 5.4.3 Pipeline Allowable Stress [FREE] ±

Calculate pipeline allowable stress from specified minimum yield stress (SMYS) and design factor (AS 2885.1 section 5.4.3).

Use the Result Table option to display a table of SMYS and allowable stress versus material grade for the selected material schedule.

Tool Input

syutype : Line Pipe Stress Type
mattype : Material Type
- SMYSu : User Defined Specified Minimum Yield Stress
dfactype : Allowable Stress Factor Type
- Fdu : User Defined Allowable Stress Factor

Tool Output

Fd : Allowable Stress Factor
SMYS : Yield Stress
Sa : Allowable Stress

CALCULATOR : AS 2885.1 Pipeline Diameter And Wall Thickness Schedule [FREE] ±

Calculate AS 2885.1 pipeline diameter and wall thickness.

The pressure design wall thickness is equal to the nominal wall thickness minus the corrosion allowance. The fabrication allowance is accounted for in the design factor (an additional fabrication allowance is required in some cases). Select the pipe schedule (NPS or ISO etc), pipe diameter and wall thickness, or use the user defined option. Use the Result Table option to display the pipe schedule with nominal wall thickness and pressure design wall thickness for the selected diameter.

Tool Input

schdtype : Line Pipe Schedule Type
diamtype : Line Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
c : Wall Thickness Corrosion Allowance

Tool Output

ID : Nominal Inside Diameter
OD : Nominal Outside Diameter
OD/tn : Diameter Over Wall Thickness Ratio
tn : Nominal Wall Thickness
tp : Pressure Design Wall Thickness