Selection of materials for GC1 class pressure pipelines
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Table 1 in Article 28 of the \"Regulations on Safety Supervision of Pressure Pipelines\" (TSG D0001-2009) specifies the steel pipe standards that are not permitted for use in GC1-class pressure pipelines. The following issues are discussed here: 1. Can other steel pipe standards other than those specified in Table 1 be applied to GC1-class pressure pipelines? 2. For large-diameter carbon steel or stainless steel welded steel pipes, which pipe standards can be applied to GC1-class pressure pipelines?
Let me tell you what I know: the commonly used GB/T8163 standard cannot be used for GC1 pipes; only the GB9948 standard is applicable. I don’t know anything else about it.
It can be used; according to the standards of TSG D1001, pipes of type 8163 that have been inspected individually using ultrasonic testing can be used in applications with a pressure not exceeding 4 MPa. For more details, refer to TSG D1001
I hope my colleagues will discuss my post regarding the \"Regulations on Safety Supervision of Pressure Pipelines\".
This post was last edited by tuotuo518 on 2010-1-13 at 16:33. The GC1 pipes we use are of type 8163+, and each one needs to be inspected for defects.
I agree with the view expressed on the 3rd floor: for pressure pipelines of GC1 class, each pipe shall be subjected to ultrasonic testing, and only those that meet or exceed the requirements of level L2.5 as specified in GB/T5777-2008 \"Methods for Ultrasonic Testing of Seamed Steel Tubes\" are permitted to be used in GC1 class pipelines with a design pressure not exceeding 4.0 MPa. For GC1-grade pipes with a pressure higher than 4.0 MPa, pipes in accordance with the GB/T5310-2008 standard and the GB/T6479-2000 standard can be used.
What was said upstairs is correct; pipes and butt welding work well, but what about other pressure-bearing components (Article 26)? How should those be handled? So it’s better not to use GB8163, nor carbon structural steel; instead, use seamless stainless steel pipes or alloy steel pipes, though the cost will increase as a result.
Could you please tell me the specific scope of the GC1 pipeline? According to the standards, those that belong to enterprises or institutions——such pipelines are classified as GC1. What I don’t understand is what else does not fall under enterprises or institutions? Do the pipelines at various stations in long-distance pipelines fall under GC1? Do gate stations, storage and distribution stations, and pressure regulation stations in urban gas pipelines fall under GC1?
Urban gas pipelines belong to GB1 category pipelines 8# njtch
Use 6479 for carbon steel, and 14976 for stainless steel
For seamless pipes, the two standards you mentioned are used. So what standard should be chosen for welded pipes?