304 Stainless Steel Seamless Tube(pipe)

Product name

304 (OCr18Ni9) stainless steel seamless tube(pipe)

Product Introduction

[1] Production specifications (mm) : 06×1~830×20(can be customized according to customer requirements)

[2] Length of finished product (m) : 5-7(can be customized according to customer requirements), some of the longest up to 28m

[3]Product material: 304 (OCr18Ni9)

[4] Theoretical weight (kg/m): Cr-Ni austenitic stainless steel W=0.02491S(D-S)

[5] Implementation standards:

National standard: GB/T14975-2002 GB/T14976-2002 GB/T13296-2007

ASTM A312/A312M ASTM A269/269M ASTM A213/213A

German standard: DIN2462

JIS G3463

2, hydraulic test:Carry out hydraulic pressure test on stainless steel seamless pipe one by one, and keep at least 5 seconds under the specified pressure value. The steel pipe shall not leak or leak, and the conventional supply water pressure pressure test is P=2SR/D(the maximum is not more than 20MPa).

3, corrosion resistance:General intergranular corrosion resistance and excellent corrosion resistance, alkali solution and most of the organic acids and inorganic acids also have a certain corrosion resistance, the stainless steel seamless pipe are provided according to the standard or the corrosion method agreed by the two sides for corrosion resistance test, no intergranular corrosion tendency.

4, process performance test: flattening test. Tensile test. Flaring test. Hardness test. Metallographic test. Non-destructive testing (including eddy current testing and ultrasonic testing).

Product use

Used in acid pipelines, chemical equipment, heat exchanger pipelines, and other processing equipment in contact with fresh water, 304 stainless steel is very successfully used in fresh water with low chloride ion content. In general, especially in the case of cracks, the limit of 304 stainless steel is 100ppm chloride. High chloride content may cause crevice corrosion and spot corrosion. Under more severe conditions, such as low PH, or high temperatures, stainless steel with a higher molybdenum content, such as 316, will be considered. 304 At 427° C -816° C temperature, exposed to harsh environment, easy to form intergranular corrosion.

Primary user

Boiler plant, heat exchanger plant, chemical plant, water treatment plant, etc.

Matters needing attention

1, 304 stainless steel seamless pipe is not recommended for Marine environment.

2, no matter how corrosive, stainless steel in the process of processing and use, to keep its surface clean.

For light industry, less maintenance is required, and only sheltered areas sometimes need to be cleaned with pressurized water.

Heavy industry recommends frequent cleaning to remove accumulated dust, which may eventually cause corrosion and damage the surface appearance of stainless steel.

Stubborn stains and deposits can be scrubbed with detergent and fiber brush, sponge, stainless steel wool. Stainless steel lint can leave a permanent scratch on a smooth stainless steel surface.

Many stainless steels are cleaned and disinfected regularly. Equipment usually uses special caustic soda, organic solvents, acidic solutions (such as phosphoric acid or vitriol)For washing.

Strong reducing acids (such as hydrofluoric acid or hydrochloric acid) can cause damage to stainless steel. After solution cleaning, rinse stainless steel seamless tube(pipe) thoroughly with clean water.