HG/T 3172-2002
尿素高壓設備制造檢驗方法.尿素級超低碳鉻鎳鉬奧氏體不銹鋼晶間腐蝕傾向試驗的試樣制取
Fabrication and inspection method for High pressure urea equipment preparation of the test coupons for the intergranular corrosion trend test on the urea grade extra low carbon Cr-Ni-Mo austenitic stainless steel