... can be required7)Chemical composition &Mechanical PropertyStandardSteel GradeChemical Composition %T S MPaYSMPaElongation% CMnPS MINAPI-5LB0.271.150.030.0341324121.5-29 ... 24 SAW/SSAW Spiral Welded Steel PipeQUALITY STANDARD1>SY/T 5040 Spiral submerged arc-welded steel pipe piles2>CJ ... for municipal heat supplySteel Grade1>GB/T 13793, GB/T 6728, GB 15831, SY/T 5040,CJ/T 3022Q195, Q215, Q235, Q275, Q295 ...