Ultimate capacity of blast loaded structures common to chemical plants

Abstract Allegheny Ludlum AL276 is widely used in the most severe environments found in chemical plants and in power plant desulfurization systems. The high molybdenum level with tungsten gives excellent pitting and crevice corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: Ni-497. Producer or source: Allegheny Ludlum Corporation.

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Performance Stability of Small Biological Chemical Treatment Plants

Water Science & Technology ◽

10.2166/wst.1990.0212 ◽

1990 ◽

Vol 22 (3-4) ◽

pp. 275-282

Author(s):

R. Storhaug

Keyword(s):

Activated Sludge ◽

Chemical Treatment ◽

Chemical Precipitation ◽

Poor Quality ◽

Precipitation Process ◽

Chemical Plants ◽

Effluent Standards ◽

Main Portion ◽

Rotating Biological Contactors ◽

Number Of Treatment

Biological and chemical treatment plants constitute a main portion of the overall number of treatment plants in Norway. The biological and chemical plants are divided into three process groups, simultaneous precipitation and activated sludge, combined precipitation and rotating biological contactors (RBC) and post precipitation and activated sludge. Aluminium sulphate or ferric chloride are the commonly used flocculants in the chemical precipitation process. Effluent data from 174 Norwegian biological chemical treatment plants are evaluated. Compared to the effluent standards for each process group, post precipitation shows the best performance. On an average these plants have the lowest actual utilization of the design capacity. The most important factors that cause the treatment plants not to meet the effluent standards are, poor quality of the sewer system, improper design of the plant and organizational problems. Satisfactory separation of particles, flow equalization and proper operational management, are the basic demands to achieve low effluent concentrations for tot-P and BOD7.

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Welding Problems with Steels used on Chemical Plants

Indian Welding Journal ◽

10.22486/iwj.v2i1.150288 ◽

2017 ◽

Vol 2 (1) ◽

pp. 21

Author(s):

O. J. Dunmore

Keyword(s):

Chemical Plants

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Evaluating and Predicting Energy Efficiency Using Slow Feature Partial Least Squares Method for Large-scale Chemical Plants

Energy ◽

10.1016/j.energy.2021.120582 ◽

2021 ◽

pp. 120582

Author(s):

Li Zhu ◽

Zhe Li ◽

Junghui Chen

Keyword(s):

Energy Efficiency ◽

Least Squares ◽

Partial Least Squares ◽

Large Scale ◽

Least Squares Method ◽

Chemical Plants ◽

Partial Least Squares Method

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Influence of viscous dampers ultimate capacity on the seismic reliability of building structures

Structural Safety ◽

10.1016/j.strusafe.2021.102096 ◽

2021 ◽

Vol 91 ◽

pp. 102096

Author(s):

Fabrizio Scozzese ◽

Laura Gioiella ◽

Andrea Dall'Asta ◽

Laura Ragni ◽

Enrico Tubaldi

Keyword(s):

Building Structures ◽

Ultimate Capacity ◽

Viscous Dampers ◽

Seismic Reliability

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Experimental Behavior of Steel-Concrete Composite Girders with UHPC-Grout Strip Shear Connection

Buildings ◽

10.3390/buildings11050182 ◽

2021 ◽

Vol 11 (5) ◽

pp. 182

Author(s):

Zhi-Qi He ◽

Changxue Ou ◽

Fei Tian ◽

Zhao Liu

Keyword(s):

High Performance ◽

High Performance Concrete ◽

Fatigue Testing ◽

Ultimate Capacity ◽

Horizontal Shear ◽

Interface Failure ◽

Interface Shear ◽

Composite Action ◽

Shear Connection ◽

Push Out

This paper develops a new type of shear connection for steel-concrete composite bridges using Ultra-High Performance Concrete (UHPC) as the connection grout. The UHPC-grout strip shear connection is fabricated by preforming a roughened slot in the concrete deck slab, welding an embossed steel rib longitudinally to the upper flange of the steel girder, and casting the strip void between the slot and the steel rib with UHPC grout. The structural performance of the new connection was validated by two sets of experimental tests, including push-out testing of shear connectors and static and fatigue testing of composite beams. The results of push-out testing indicate that the UHPC-grout strip shear connection exhibits a significant improvement of ductility, ultimate capacity, and fatigue performance. The interface shear strength of the UHPC-grout strip connection is beyond 15 MPa, which is about three times that of the strip connection using traditional cementitious grouts. The ultimate capacity of the connection is dominated by the interface failure between the embossed steel and the UHPC grout. The results of composite-beam testing indicate that full composite action is developed between the precast decks and the steel beams, and the composite action remained intact after testing for two million load cycles. Finally, the trail design of a prototype bridge shows that this new connection has the potential to meet the requirements for horizontal shear.

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