Jiangsu Hongbao Group Co., Ltd.
| Supply Ability | 30000MT per year |
| Delivery Time | Within 50 days if production |
| Packaging Details | seaworthy plywooden case packing. |
| Payment Terms | L/C, T/T |
| Material: | ST37.4, ST52.4, E235, E355, 26MnB5, 34MnB5 |
| Brand: | Hongbao |
| Certificate: | TS16949, DNV, PED, ISO |
| Origin: | Jiangsu,China |
| OD: | 6-120mm |
| Thickness: | 0.5-15mm |
| Type: | Welded or Seamless |
| Processing: | Cold Drawn, Cold Rolled |
| Brand Name | Hongbao |
| Model Number | HBPST-1 |
| Certification | TS16949, DNV, PED, ISO |
| Place of Origin | Jiangsu, China |
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Product Specification
| Supply Ability | 30000MT per year | Delivery Time | Within 50 days if production |
| Packaging Details | seaworthy plywooden case packing. | Payment Terms | L/C, T/T |
| Material: | ST37.4, ST52.4, E235, E355, 26MnB5, 34MnB5 | Brand: | Hongbao |
| Certificate: | TS16949, DNV, PED, ISO | Origin: | Jiangsu,China |
| OD: | 6-120mm | Thickness: | 0.5-15mm |
| Type: | Welded or Seamless | Processing: | Cold Drawn, Cold Rolled |
| Brand Name | Hongbao | Model Number | HBPST-1 |
| Certification | TS16949, DNV, PED, ISO | Place of Origin | Jiangsu, China |
| High Light | precision seamless tubing ，erw precision tubes | ||
DIN2391 ST37.4 High Precision Seamless Carbon Steel Tube Precision Steel Tube For Brake Pipes
Description:
DIN2391 E235 high precision seamless carbon steel tube for brake pipes is manufactured to precise specifications, ensuring consistent wall thickness, smooth surface, and accurate dimensions. Ideal for automotive brake systems, these tubes provide reliable and efficient fluid transfer, enhancing vehicle safety and performance.
Tolerance in Dimension:
| OD | GB/T3639(GB8713) | DIN2391(EN10305) | Our Tolerence | Best Quality |
| 4-30mm | ±0.10mm | ±0.08mm | ±0.05mm | ±0.02mm |
| 31-40mm | ±0.15mm | ±0.15mm | ±0.05mm | ±0.03mm |
| 41-50mm | ±0.20mm | ±0.20mm | ±0.05mm | ±0.03mm |
| 51-60mm | ±0.25mm | ±0.25mm | ±0.08mm | ±0.03mm |
| 61-70mm | ±0.30mm | ±0.30mm | ±0.10mm | ±0.05mm |
| 71-160mm | ±0.30mm | ±0.30mm | ±0.10mm | ±0.05mm |
| Tolerance in WT | ±0.12mm | ±0.10mm | ±0.05mm | ±0.03mm |
| Process | Diameter | Length | Precision | Inner Hole Roughness |
| Cold Rolled | 30-100mm | ≤12 m | H8-H10 | 0.4-1.6 |
| Cold Draw | 30-250mm | ≤12 m | H8-H10 | 0.8-1.6 |
| Honing | 40-500mm | ≤12 m | H8-H9 | 0.4-0.8 |
| Rolling | 40-400mm | ≤7 m | H8 | 0.4 |
| Inner Diameter | H8 | H9 | H10 | |
| 30mm | ±0.033 | ±0.052 | ±0.084 | 5-30mm |
| 30-50mm | ±0.039 | ±0.062 | ±0.100 | ±0.080 |
| 50-80mm | ±0.046 | ±0.074 | ±0.120 | |
| 80-120mm | ±0.054 | ±0.087 | ±0.140 | |
| 120-180mm | ±0.063 | ±0.100 | ±0.160 | |
| 180-250mm | ±0.072 | ±0.115 | ±0.185 | |
| 250-315mm | ±0.081 | ±0.130 | ±0.210 | |
| 315-400mm | ±0.089 | ±0.140 | ±0.230 |
Testing:
| 1. 100% PMI,Spectro Chemical Aanlysis Test for Raw Material |
| 2. 100% Dimension & Visual Examination |
| 3. Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test |
| 4. 100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test (ET or UT) |
Material grade:10#~45#, 16Mn, ST35~ST52
Length:as customer’s need
Standard: DIN2391, EN10305, GB/T3639, GB8713
Application: hydraulic cylinder, automobile
Heat Treatment: according to the customer’s need
Delivery time : 30days more or according to the customer’s acquirement
Package:
1. bundle packing
2. marking as per customer's requests
3. paint on the pipe as per customer request
4. pipe caps as customer reque
Company Details
Business Type:
Manufacturer
Year Established:
1958
Total Annual:
60000000-80000000
Employee Number:
700~1000
Ecer Certification：
Verified Supplier
Jiangsu Hongbao Group (Pipe) Co., Ltd. (Zhangjiagang Hongda Pipe Co., Ltd.) is a high-tech company in Jiangsu province. The company has a registered capital of RMB 89 million, covers an area of 130,000 square meters, employs 600 staff, and has annual sales of RMB 400 million. The company is speciali... Jiangsu Hongbao Group (Pipe) Co., Ltd. (Zhangjiagang Hongda Pipe Co., Ltd.) is a high-tech company in Jiangsu province. The company has a registered capital of RMB 89 million, covers an area of 130,000 square meters, employs 600 staff, and has annual sales of RMB 400 million. The company is speciali...
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