a) On Specified OD + 0.5mm (Ovality 0.5mm) b) The Inside Diameter of ubes shall allow insertion of a guage of 37.7mm dia for a minimum length of 200mm. c) On Wall thickness -10% d) The mass deviation on a single tube shall not exceed -7.5% of the specified mass. 2. ENDS:
Cut cleanly and nominally square with the axis of the tube and free from excessive burrs. 3. PROPERTIES:
a) Chemical (Maximum) C - 0.20%, SI - 0.05%, MN - 1.40%, P - 0.04%, S - 0.045%, AL - Min. 0.02%. b) Mechanical = UTS - 340 to 520 N/mm2, YS - 235 N/mm2 (minimum) & %Elongation on 5.65 S0 - 24% (minimum). 4. FLATTENING TEST WELD AT 90 DEGREES (COLD): a) For weld : Distance between the platens, measured under load is not greater than 75% of the OD of tube. b) For Material :Distance Between the platens, measured under load is not greater than 60% of the OD of tube. 5. STRAIGHTNESS:
1 in 500 (In 1 meter it should not exceed 3mm). 6. ZINC COATING:
Minimum local coating thickness on the outside surface 40 microns. (GALVANIZING) 7. MARKING:
a) We can emboss mill sign "EN 39 UTP 3 or 4." online at every one meter interval over the length of pipe. b) We can do online stencilling as per customer needs. 8. PACKING:
Hexagonal type. 9. MILL TEST CERTIFICATE:
We can issue a MTC, certifying that the tubes supplied comply with this Standard.
We,Tianjin JMS Steel Co.,Ltd located in China’ famous steel base Daqiuzhuang Town,Jinghai County,Tianjin City with favourable geographical location and convenient transportation.The registered capital of the company is 43 million with two subsidiary corporations ,Tianjin Xide Steel Co.,Ltd and Tianjin Junyixing Steel pipe Co.,Ltd.
Our company has great strength and perfect supporting facilities at any time to provide the customers with quality products and efficient services.Over the years,in line with”strives for the survival by the quality,seek development with prestige” the idea of growing,won the high praise of general customers in the industry.
Our company mainly manufacture and deal with hot –rolled steel strips,galvanized steel strips,galvanized steel ,welded steel tubes,C,Z,U type steel,steel beams .
“Customer first ,reputation fitst” is our service tenet.Our company is equipped with after-sales department,shipping department for the general customers save money,save time,save worry,energy,providing the omni-directional service.Welcome enquries from all over the world.