gb/astm/ jis/en/iso precision seamless steel tube
gb/astm/ jis/en/iso precision seamless steel tube
Product DescriptionShengji is the leading manufacture of precision cold rolling carbon steel pipe. It is widely used as barrel & plunger, motor housing, gas springs, shock absorbers, cylinders, body-building instruments, automotive industry, etc. Precision cold rolling carbon steel pipe is recommended for applications where accuracy, roughness and cleanness of the pipe is a priority. The inner and outer walls of the precision steel pipes have high accuracy and excellent roughness (Ra=0.2 - 0.6).The materials can be altered to meet customers' requirements. Shengji precision cold rolling steel pipe can also withstand high pressure. Both the inner and outer walls have a smooth finish with no oxidation layer on the surface. Our pipe features the best technology in both domestic and international markets.
1.Inner and outer walls of pipe have high accuracy, excellent roughness (Ra=0.2 - 0.6).
2.Materials can be altered to meet customers' requirements.
3.Inner and outer wall smooth finish.
4.Able to withstand high pressure.
Specifications
Production Process 
The steel pipe can be used for downhole pump barrel & plunger, sucker rod coupling, ESP housing, motor bearing and housing.
1.Sucker Rod Pump
Barrel specification | Nominal Dia.(in) | I.D. Tolerance(mm) | Wall thickness | Material | Plunger specification | O.D. tolerance(mm) | Length (in) |
Φ32 | 1 1/4” | ±0.05 | 3/50” 1/8” 1/4” 3/8” 3/4” 7/8” 1” | 1.Carbon steel 1020,1026,1045 etc); 2.Brass 3.Alloy steel 304,316,316L,S50100, 4130,13Cr,P9 etc. | Φ32 | ±0.05 | 4’-6’ |
Φ38 | 1 1/2” | ±0.05 | Φ38 | ±0.05 | |||
Φ44 | 1 3/4” | ±0.05 | Φ44 | ±0.05 | |||
Φ50 | 2” | ±0.05 | Φ50 | ±0.05 | |||
Φ57 | 2 1/4” | ±0.05 | Φ57 | ±0.05 | |||
Φ70 | 2 3/4” | ±0.10 | Φ70 | ±0.10 | |||
Φ83 | 3 1/4” | ±0.10 | Φ83 | ±0.10 | |||
Φ95 | 3 3/4” | ±0.10 | Φ95 | ±0.10 | |||
Φ108 | 4 1/4” | ±0.10 | Φ108 | ±0.10 | |||
Φ220 | 8 5/8” | ±0.10 | Φ220 | ±0.10 | |||
Φ280 | 11” | ±0.10 |
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2.Brass Sucker rod pump
To solve downhole sucker rod pump corrosion, Shengji developed brass sucker rod pump using precise rolling after 2 year’s studying. Now, Shengji is the first manufacturer in China and the products have been successfully exported to America, Canada, Russia, Tunisia, Kazakhstan, Iran, Saudi Arabia,etc.
3.Pump housing for Electric Submersible Pump (ESP)
ESP housing manufactured by shengji has high precision and can be assembled without honing. 
(Φ16~Φ210) Specification | Nominal Dia. | Tolerance | Wall Thickness | Material |
Φ139 | 139.7mm/ 5 1/2” | ±0.05mm | 3.18mm/ 1/8” 6.35mm/ 1/4” 9.53mm/ 3/8” | Alloy steel pipe (16Mn,1Cr5Mo,35CrMo,9Cr1Mo,13Cr,22Cr, A 335P9,4130,K500,718) |
Φ178 | 177.8mm/ 7” | ±0.05mm | ||
Φ210 | 209.55mm/ 8 1/2” | ±0.05mm | ||
Φ280 | 279.4mm/11” | ±0.05mm |
4.Cold Rolled Brass Pipe
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