Results 81 to 90 of about 1,378,667 (312)

National Pipeline Mapping System (NPMS) : repository standards [PDF]

This draft document contains 7 sections. They are as follows: 1. General Topics, 2. Data Formats, 3. Metadata, 4. Attribute Data, 5. Data Flow, 6. Descriptive Process, and 7. Validation and Processing of Submitted Data.
Second Joint Government/Industry Pipeline Mapping Quality Action Team
core  

Reconstruction of a moss layer in permafrost conditions

Magazine of Civil Engineering
The object of research in this work is the relationship between the feasibility of secondary use the moss layer and the thermal characteristics of an oil pipeline, which was laid underground in permafrost conditions.
Kolosova Natalya, Kolosov Evgeni, Ptukhina Irina, Rineyskaya Anastasiya   +3 more
doaj   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

National Pipeline Mapping System (NPMS) : standards for creating pipeline location data : standards for electronic data submissions, including metadata standards and examples [PDF]

These standards represent a guideline for preparing digital data for inclusion in the National Pipeline Mapping System Repository. The standards were created with input from the pipeline industry and government agencies.
Second Joint Government/Industry Pipeline Mapping Quality Action Team
core  

Reusing depleted oil and gas wells for geothermal energy: Feasibility, challenges, and a decision‐making framework for sustainable conversion

Deep Underground Science and Engineering, EarlyView.
The graphical abstract presents a structured decision‐support framework for assessing the feasibility of converting depleted oil and gas wells into geothermal energy systems. The left panel illustrates a comprehensive, multi‐stage decision‐making framework progressing from prefeasibility screening and technical–economic analysis to policy alignment ...
Karolina Bieryt, Yu Pan, Heinz Konietzky, Fei Wang   +3 more
wiley   +1 more source

Replication Data for: A Closer Look at Underground Natural Gas Pipeline Leaks Across the United States

, 2022
Replication Data for: A Closer Look at Underground Natural Gas Pipeline Leaks Across the United ...
Cho, Younki, Steadman, Nathaniel L., Zimmerle, Daniel J., Bell, Clay S., Smits, Kathleen M., Ulrich, Bridget A.   +5 more
core   +1 more source

Developing a universal tunnel span classification from global tunnel databases

Deep Underground Science and Engineering, EarlyView.
A universal tunnel span classification system is introduced that incorporates tunnel span, cross‐sectional area, typical tunnel types, and intended uses. Representative flatness ratio values are also provided for each span class. The classification is derived from a comprehensive database of 450 tunnel profiles from 47 countries.
Simon Heru Prassetyo, Inzagi Suhendar, Semmy Andrew Anugerah Djawa Tagi, Bonifacio Bondan Satryojati, Dzakwan Naufal Pratama, Yeremia Sintong Damero, Yudhidya Wicaksana, Erwin Lim, Ridho Kresna Wattimena   +8 more
wiley   +1 more source

Prolonging the lives of buried crude-oil and natural-gas pipelines by cathodic protection [PDF]

, 2007
In Nigeria, a major problem is the corrosion of the external surfaces of such pipelines, which are not usually adequately safeguarded during construction.
Ihekwoaba, S. C., Probert, Sydney D., Lilly, M. T., Ogaji, Stephen O. T., S.O.T. Ogaji, M.T. Lilly, S.C. Ihekwoaba, S.D. Probert   +7 more
core   +1 more source

Bio‐based tannin‐loaded layered double hydroxides in epoxy coatings for smart corrosion protection of steel in underground infrastructure

Deep Underground Science and Engineering, EarlyView.
This study presents a sustainable smart‐coating strategy for protecting underground steel infrastructures from chloride‐induced corrosion. Zinc‐aluminum layered double hydroxides (LDHs) and tannin‐loaded LDHs (LDH–TA) were incorporated into an epoxy matrix to provide both enhanced barrier properties and active, pH‐responsive inhibition.
Veerle Vandeginste, Xinyu Guo, Dawid Kasprzak, Yukun Ji   +3 more
wiley   +1 more source

A hierarchical adaptive strategy for selecting rheological models in intelligent backfill mining pipeline transportation systems

Deep Underground Science and Engineering, EarlyView.
This graphical abstract presents a hierarchical adaptive strategy for selecting rheological models in intelligent backfill pipeline transportation. Temperature, fly ash content, and water‐cement ratio jointly influence slurry rheological nonlinearity, which is quantified using the Model Fidelity Gain (ΔR2).
Defeng Wang, Xintao Song, Aixiang Wu, Yong Wang   +3 more
wiley   +1 more source