An Erosion Resistant Pipe Bend

A new 90-deg bend shape has been developed for erosion resistance. The design consists of a gradually expanding inlet, a large-diameter curved section, and a gradually contracting outlet. Tests were conducted using alumina particles in air at an average velocity of 27 m/s, passing through a carbon steel bend. The new bend design had an erosion life exceeding 4000 hr, compared to 38 hr for a conventional bend design.

Download Full-text

Correlation between surface-hardness degradation and erosion resistance of carbon steel—Effects of slurry chemistry

Tribology International ◽

10.1016/j.triboint.2014.11.008 ◽

2015 ◽

Vol 83 ◽

pp. 146-155 ◽

Cited By ~ 10

Author(s):

B.T. Lu ◽

J.L. Luo

Keyword(s):

Carbon Steel ◽

Erosion Resistance ◽

Surface Hardness

Download Full-text

Stress and flexibility factors for multi-mitred pipe bends subjected to internal pressure combined with external loadings

Journal of Strain Analysis ◽

10.1243/03093247v072097 ◽

1972 ◽

Vol 7 (2) ◽

pp. 97-108 ◽

Cited By ~ 7

Author(s):

M P Bond ◽

R Kitching

Keyword(s):

Internal Pressure ◽

Large Diameter ◽

Pipe Bend ◽

Bending Tests ◽

Bending Load ◽

Out Of Plane ◽

Thin Walled ◽

Plane Bending ◽

Internal Pressures ◽

Stress Patterns

The stress analysis of a multi-mitred pipe bend when subjected to an internal pressure and a simultaneous in-plane or out-of-plane bending load has been developed. Stress patterns and flexibility factors calculated by this analysis are compared with experimental results from a large-diameter, thin-walled, three-weld, 90° multi-mitred bend which was subjected to in-plane bending tests at various internal pressures.

Download Full-text

Specification for Large-Diameter Fabricated Carbon Steel Flanges

10.1520/f1311 ◽

2008 ◽

Author(s):

Keyword(s):

Carbon Steel ◽

Large Diameter

Download Full-text

Slurry erosion resistance of thermally sprayed Nb2O5 and Nb2O5+WC12Co composite coatings deposited on AISI 1020 carbon steel

Ceramics International ◽

10.1016/j.ceramint.2020.07.264 ◽

2020 ◽

Vol 46 (17) ◽

pp. 27670-27678

Author(s):

Hipólito Carvajal Fals ◽

Luciano Augusto Lourençato ◽

Mario Sánchez Orozco ◽

Maria Julia Xavier Belém ◽

Carlos Roberto Camello Lima

Keyword(s):

Carbon Steel ◽

Erosion Resistance ◽

Composite Coatings ◽

Slurry Erosion ◽

Thermally Sprayed

Download Full-text

Carbon Steel X65QS Pipeline Qualification for Extreme Sour Service a Global Approach: Line Pipe, Welding, Eca Methodology and Diyab Pipeline Case Study

10.2118/207232-ms ◽

2021 ◽

Author(s):

Lam-Thanh Luc ◽

Hamdi Saad ◽

Matta Tanios ◽

Dr. Al Bannay Aamer ◽

Meer Mumtaz Ali Imtiaz Sirsimth ◽

...

Keyword(s):

Carbon Steel ◽

Large Diameter ◽

Base Material ◽

Global Approach ◽

Production Environment ◽

Destructive Testing ◽

Line Pipe ◽

Steel Material ◽

Pipe Welding ◽

Sour Service

Abstract In the wake of failures of large diameter pipelines made from plates using the Thermo-Mechanically Controlled Process (TMCP), the suitability of carbon steel material for sour environments where the H2S partial pressure is largely over 1 bar has been questioned. Understanding that seamless quench and tempered material are not prone to the same phenomenon as large diameter TMCP pipes, it has been decided to ensure the integrity of the DIYAB pipeline by qualification using the actual production environment pH=3.5 at 24°C and 6.84 bar H2S plus 6.84 bar CO2. The global approach includes the qualification to sour service resistance under 6.84bar H2S of the base material and the welds without post weld heat treatment. Fracture toughness tests under 6.84bar H2S were also conducted, and the results fed into an Engineering Criticality Assessment (ECA) to define the Non-Destructive Testing (NDT) acceptance criteria. The NDT tools were selected for their ability to detect the critical flaws and validated. The global approach methodology and results are presented.

Download Full-text