Carbon Steel Hydraulic Pipe
Parker recommends the use of cold drawn seamless and regular annealed (abbreviation +N) hydraulic tubes and pipes acc.
- DIN-EN 10305 (old DIN 2391) and ISO 3304.
- E235+N(St37.4); E355+N(St52.4)
- Surface Finish:
Steel (St. 37.4): Phosphated and oiled
I.D. dimensions 1.5 – 5 mm, outside and inside oiled
I.D. dimensions 6 mm and higher, outside and inside phosphated and oiled
Steel (St. 37.4) R-CF Series: Zinc Chromium-6 Free
Stainless Steel Hydraulic Pipe
Recommend the use of seamless cold drawn stainless
steel tubes and pipes acc. to:
DIN EN 10216-5, ASTM A269/A213, ASTM A312
Hot rolled pipes are not recommended for the following reasons: Hot rolled pipes do not have precision dimensions and may slip in machine dies. They have scales inside and outside. The inside scales affect the cleanliness level of the fluid and reduces fatigue levels.
Hydraulic Pillar Pipe Chemical Composition
| Grade | Chemical Composition | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Ni | Cu | Nb | |
| ≤% | |||||||||
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.25 | 0.25 | 0.20 | – |
| 35 | 0.32-0.40 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | 0.25 | 0.25 | 0.20 | – |
| 45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | 0.25 | 0.25 | 0.20 | – |
| 27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | 0.25 | 0.25 | 0.20 | – |
Hydraulic Pillar Pipe Application:
Hydraulic prop tube is made from high-quality carbon structural steel adding one or several types of alloy elements to improve the strength, toughness and hardenability of steel. This hot-rolled seamless steel pipe often needs to go through hardening and tempering, chemical hot treatment, surface hardening and other thermal remedy options.
Compared to high-quality carbon structural steel, hydraulic prop tube owns excellent integrated mechanical real estate. We always roll round, square and flat shaped steel products for usage as important structural parts in machinery or hosting server.
Hydraulic prop tube can be used the cylinder or prop in coal mine hydraulic support and used some other hydraulic cylinders or props. It could be widely applied in hydraulic system, plastic machinery, injection molding machinery, rubber machinery, forging machinery, casting machinery, engineering machinery, automobile industry, shipbuilding industry, metal processing and war field.
Hydraulic Pipe Standard List
- EN10219-1 Cold formed welded structural hollow section of non-alloy and fine grain steel, part 1 technical delivery conditions.
- EN10210-1 Hot finished structural hollow sections, part 1 technical delivery conditions.
- EN 10305, Steel tubes for precision applications – Technical delivery conditions consists of the following parts:
Part 1: Seamless cold drawn tubes
Part 2: Welded cold drawn tubes
Part 3: Welded cold sized tubes
Part 4: Seamless cold drawn tubes for hydraulic and pneumatic power systems
Part 5: Welded cold sized square and rectangular tubes
Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems - DIN 2391 (1994 edition) has been replaced by EN 10305.
- EN10255 Non-alloy steel tubes suitable for welding and threading – Technical delivery conditions.
- EN 10216-5, Seamless steel tubes for pressure purposes, Technical delivery conditions, Part 5: stainless steel tubes.
- EN 10297-1 Seamless circular steel tubes for mechanical and general engineering purposes.
- GB/T 8162-2018 Seamless steel tubes for structural purpose.
- GB/T 8163-2018 Seamless steel pipes for liquid service.
- GB/T 3639-2009 Seamless cold-drawn or cold-rolled steel tubes for precision application; modified adoption of EN 10305-1.
- GB/T 34201-2017 Seamless hot-rolled square and rectangular steel tubes for structure.
- GB/T 32957-2016 Cold drawn or cold rolled precision inner diameter seamless steel tubes for hydraulic and pneumatic system equipment.
- GB/T 17396-2009 Hot-rolled seamless steel tubes for hydraulic pillar service.
