| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SY/T 6638-2024 | English | 419 |
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4 days [Need to translate]
|
(Technical specification for energy conservation in surface engineering design of gas pipelines and underground gas storage facilities)
| Valid |
SY/T 6638-2024
|
| SY/T 6638-2012 | English | 559 |
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3 days [Need to translate]
|
Technical specification for energy conservation in natural gas transportation pipeline and underground gas storage design
| Obsolete |
SY/T 6638-2012
|
| SY/T 6638-2005 | English | 359 |
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3 days [Need to translate]
|
Code for design of energy saving in gas transmission pipeline and underground gas storage
| Obsolete |
SY/T 6638-2005
|