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In this article, it is firstly introduced the current situations of pipeline for hydrogen transport and hydrogen mixing pipeline for natural gas at home and abroad as well as representative domestic project program of pipeline for hydrogen transport such as the hydrogen transport engineering of “west to east hydrogen transmission” led by Sinopec. Secondly, the relevant international standards for construction as well as operation and maintenance management of pipeline for hydrogen transport are briefly introduced. Finally, the development opportunities of hydrogen resistant pipeline steel are introduced from four aspects, which mainly include optimizing alloy composition as well as smelting, rolling and heat treatment processes of steel for storage and transportation pipeline and container; regulating and controlling size, morphology, type and distribution of inclusions in steel as well as controlling banded structure and harmful oxide; evaluating and optimizing mechanical properties of welding materials, welds with welding process and heat affected zone in hydrogen environment, improving welding process of steel for storage and transportation pipeline, storage containers and pipeline as well as studying the effect laws of alloy compositions of base metal, compositions of welding materials and welding processes on hydrogen embrittlement of weld heat-affected zone; establishing requirement specifications for pipeline materials and products including hydrogen compatibility of base metal of pipeline and welded joints.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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