Fertilizer pipe is mainly used for transporting high temperature and high pressure fluid.
Pipes for fertilizer: GB6479-2000(seamless steel pipe for high pressure fertilizer equipment). It is mainly used for high-temperature and high-pressure chemical equipment. The typical kinds of materials are 20, 16Mn, 12CrMo, 12Cr2Mo, and so on.
Pipes for fertilizer: (GB6479-86) is applied to chemical equipment and pipeline with working temperature of -40-400 ℃ and working pressure of 10-30Ma. It is a kind of seamless steel pipe which is made of high-quality carbon structural steel and alloy steel. 
Straight welded steel pipe is mainly used for compressed air, drainage, its commonly used materials are Q235 Grade A and B steel.
GB/T14980-1994 refers to large diameter electric welded steel pipe for low pressure fluid. Boiler tubes are mainly used for transporting low pressure fluids such as water, sewage, gas, air, heating system and others. The commonly used material is Q235 Grade A steel. 
Product Name: Seamless Steel Tube for High Pressure Fertilizer.
Standards: GB6479-2000, ASTM DIN JIS.
Grade and steel grade: 20 # 16Mn, 15CrMo, 12CrMo, 12Cr2Mo, etc.