Production Description
1) Usage and Standard
Usage: Boiler, Heat Exchanger, Economizer, Condenser, Hydraulic tube, Fluid tube, physical construction, hydraulic device, automobile parts, Steel sleeve, bearing, hydraulic cylinder, Pneumatic cylinder and hydraulic tube
Standard: ISO, JIS, GB, DIN, ASTM, API
2) Drawing of Precision Pipe
3) Product Size Specification Table (mm) (Blue Area)
Remark: We also produce customized sizes out of this list
4) Chemical composition
Chemical composition of precision tube in frequently used grade
| Standard | Grade | Chemical composition (%) |
| | | C | Si | Mn | S | P | Cr |
| GB/T699 | 10# | 0.07~0.13 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 | |
| GB/T3639-2000 | 20# | 0.17~0.23 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 | |
| GB3077-88 | 35# | 0.32~0.39 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 | |
| | 45# | 0.42~0.50 | 0.17~0.37 | 0.50~0.80 | ≤0.035 | ≤0.035 | |
| | 40cr | 0.37~0.44 | 0.17~0.37 | 0.50~0.80 | ≤0.035 | ≤0.035 | 0.08~1.10 |
| | 25Mn | 0.22~0.29 | 0.17~0.37 | 0.70~1.00 | ≤0.035 | ≤0.035 | ≤0.25 |
| | 37Mn5 | 0.30~0.39 | 0.15~0.30 | 1.20~1.50 | ≤0.015 | ≤0.020 | |
5) Mechanical properties
Mechanical properties of common precision pipe
| Standard | Grade | Designation (%) |
| | | Cold finished (hard)(BK) | Cold finished (Soft) BKW |
| | | UTS(Ultimate Tensile Strength) | percentage elongation after fracture | UTS(Ultimate Tensile Strength) | percentage elongation after fracture |
| | |
| | | σ b (Mpa) | δ 5(%) | σ b (Mpa) | δ 5(%) |
| GB/T3639-2000 | 10# | ≥410 | ≥6 | ≥375 | ≥10 |
| GB3077-88 | 20# | ≥510 | ≥5 | ≥450 | ≥8 |
| | 35# | ≥590 | ≥4 | ≥550 | ≥6 |
| | 45# | ≥645 | ≥4 | ≥630 | ≥5 |
| | 40cr | ≥784 | ≥12 | | |
| | 37Mn5 | ≥784 | ≥12 | | |
Remarks:
Cold Finished (Hard): Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
Cold Finished (Soft): The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)
6) Product Application Industry
Application Field:
Mechanical processing, machinery manufacturing, automobile
7) Quality Control
A. Advanced Production Equipment
B. Production Flow
C. Skill-full and Qualfied Workers, Training and Testing before Working
D. Strictly Qualtity Control System
8) Packing & Shipping
A) Packing Method
Small size in bundles, big size in bulk, with plastic cap to protect both ends, seaworthy packaging or as per customer's requests.
B) Shipping Way
As per customer's request.
Usually by Sea, by Air, by Train or River-and-Sea Coordinated Transport.
FAQ
Q: What about your payment term?
A: Usually T/T or L/C, 30% deposit and 70% before delivery.
Q: what about your standard delivery date ?
A: 30 days after receiving deposit
Q: How about your capacity ?
A: For steel tubes, 50,000 tons per month, 600,000 tons per year. For tube fittings, 30,000 tons per year
Q: what about your package ?
A: Usually as per customer's requests.
Common packing information: Small size in bundles, big size in bulk, some sizes with plastic cap to protect both ends, seaworthy packaging.
Q: What is your main market &main customers ?
A: We have 35 years experiences on steel Tubes & Tube Fittings. Our main customers are from over 30 countries.
Q: If products have some quality problem,how would you deal with?
A: We will responsible for all of our quality problems.
Q: How to get accurate price / quotation from you?
A: Please kindly tell us below details and we'll send our quotation to you ASAP:
1) Pipe's outer diameter
2) Wall thickness
3) Section Shape (round, square etc.)
4) Length for each pipe
5) Steel grade
6) Standard (e.g.: API 5L)
7) Order quantity
8) Designation (BK, BKW etc.)
9) Trade Terms
P.S.: more detailed information you clarified, more exact price we provided.
