UA-69298255-1 UA-69298255-2 CSA Z662 Pressure design for components — Integrally reinforced extruded outlet headers

CSA Z662 Pressure design for components — Integrally reinforced extruded outlet headers

June 19, 2020

Integrally reinforced extruded outlet headers shall be acceptable for all ratios of branch pipe diameter to run pipe diameter, provided that they comply with the following requirements:

a) An extruded outlet header shall be a header in which the extruded lip at the outlet has a height above the surface of the run that is equal to or greater than the radius of curvature of the external contoured portion of the outlet, i.e., ho is equal to or greater than ro (see Figure 4.2).

b) These requirements shall not apply to any outlet in which additional non-integrated material is applied in the form of rings, pads, or saddles.

c) These requirements shall apply only to cases where the axis of the outlet intersects, and is perpendicular to, the axis of the run.

d) The nomenclature used herein and in Figure 4.2 shall be as follows:

AR = minimum required reinforcement area, mm2

D = outside diameter of run pipe, mm

Dc = corroded/eroded inside diameter of run pipe, mm

Do = corroded/eroded inside diameter of extruded outlet, measured at the level of the outside 

surface of run pipe, mm

d = outside diameter of branch pipe, mm

dc = corroded/eroded inside diameter of branch pipe, mm

ho = height of the extruded lip, mm (this shall be equal to or greater than ro

L = height of the reinforcement zone, mm = 0.7*(d X To)^0.5

ro = radius of curvature of external contoured portion of outlet measured in the plane containing the axes of the run and branch pipe, subject to the limitations in Items e) to h), mm

r1 = half-width of reinforcement zone, which is equal to Do, mm

Tb = nominal wall thickness of branch pipe, excluding corrosion/erosion allowance, mm

To = corroded/eroded finished wall thickness of extruded outlet, measured at a height equal to

ro above the outside of run pipe, mm

Tr = nominal wall thickness of run pipe, excluding corrosion/erosion allowance, mm 

tb = design wall thickness of branch pipe, excluding corrosion/erosion allowance, mm 

tr = design wall thickness of run pipe, excluding corrosion/erosion allowance, mm

e) The radius of curvature shall be not less than 0.05 d, except that for branch pipe sizes larger than 762 mm OD, it need not exceed 40 mm.

f) The radius of curvature shall be not greater than 0.10 d plus 10 mm for branch pipe sizes 219.1 mm OD or larger, and not greater than 30 mm for branch pipe sizes smaller than 219.1 mm OD.

g) Where the external contoured portion contains more than one radius, the radius of any arc sector of approximately 45° shall meet the requirements of Items e) and f).

h) Machining shall not be employed in order to meet the requirements of Items e) and f).

i) The minimum required reinforcement area, AR, shall be as determined using the following formula:

AR = K(tr × Do)

where

K = 1.00 for d/D ratios greater than 0.60

K = 0.60 + (2/3 × d/D) for d/D ratios greater than 0.15, up to and including 0.60

K = 0.70 for d/D ratios equal to or less than 0.15

j) The reinforcement area shall be equal to or greater than AR and shall be the sum of areas A1, A2, and A3, which are as follows:

i) A1 is the area lying within the reinforcement zone resulting from any excess thickness available in the run pipe wall, i.e., A1= Do(Tr – tr);

ii) A2 is the area lying within the reinforcement zone resulting from any excess thickness available in the branch pipe wall, i.e., A2 = 2L(Tb – tb); and

iii) A3 is the area lying within the reinforcement zone resulting from excess thickness available in the extruded outlet lip, i.e., A3 = 2ro(To – Tb).

k) Multiple outlets shall be reinforced as specified in Clause 4.3.20, except that the reinforcement area shall be as specified in Item j).

Read More: 

CSA Z662-15 (Oil and gas pipeline systems)

Located in Calgary Alberta, We offer our Pipeline Engineering Services across Canada. To get our Piping Stress Analysis Services, please contact our Engineering firm at: 

 

 

littlepenginfo@gmail.com

1(855)444-5577

 

 

 

 

 

Please reload

Rate UsDon’t love itNot greatGoodGreatLove itRate Us

LITTLE P.ENG. FOR ENGINEERS TRAINING /  Engineering Consultant

3705 Fonda Way #18 Southeast Calgary, T2A 6G9

Canada

Bay area, California

Stay Connected

  • Facebook Social Icon
  • Twitter Social Icon
  • LinkedIn Social Icon
  • LinkedIn
  • yp-logo-original
  • Yelp Social Icon
  • Google Places Social Icon
  • Pinterest Social Icon