|5-2 Room, Building #2 Huanhe Center, No.163 Ruiqing Road, Jiangdong District, Ningbo, Chinaemail@example.com|
|Place of Origin:||China|
|Brand Name:||Jazzy Industrial|
|Minimum Order Quantity:||Negotiable.|
|Packaging Details:||Plastic in both ends, then packed in case|
|Section Shape:||Round||Techinique:||ERQ Welding|
6 Meter 316l Stainless Steel Seamless Tube ERQ Welding ASTM A790 EN10216-5
Standard : ASTM A312, ASTM A554, ASTM A790, EN10216-5,
EN10217-7, JIS G3468, JIS G3459
Material : 304, 316L, 321, 310S, 1.4301, 1.4307, 1.4404, S31803,
S32750, 904L, Monel 400, Inconel 800
Surface : Pickling, 400grit polishing, 600grit polishing, mirror finish
Packing : In bundles with waterproof material, in wooden cases
Shipment : By sea, by air, by express
A, according to the provisions of GB14975-94< stainless steel seamless steel pipe steel pipe length >,
usually (not length) of hot-rolled steel 1.5 ~ 10m, hot extruded steel pipe is equal to and greater than 1m.
cold drawing (rolling) steel pipe wall thickness of 0.5 ~ 1.0mm, 1 ~ 7m; the wall thickness is greater than
1.0mm, 1.5 ~ 8m.
B, hot rolling (hot extrusion) pipe diameter of 54 ~ 480mm is 45; the wall thickness is 4.5 to 45mm. A total
of 36 kinds of cold drawing (rolling) steel pipe diameter of 6 ~ 200mm is 65; the wall thickness is 0.5 to
21mm a total of 39.
C, both inside and outside the pipe surface shall not have cracks, folding, cracking, crack, rolling
reduction, there is separation and scab defects, these defects should be completely removed (except for
machining tube), after the removal of the outer wall thickness and shall not exceed the negative
deviation. Where does more than allow negative deviation of the minor surface defects can he not clear.
D, straight allows depth. Hot rolling, hot extruded steel pipe, the diameter is less than or equal to 140mm
less than 5% of the nominal wall thickness, the maximum depth of not more than 0.5mm; cold drawing
(rolling) steel is not greater than 4% of the nominal wall thickness, the maximum depth of not more than
E, the pipe ends should be cut at right angles, and remove the burr. The manufacturing process of
stainless steel seamless pipe: 1 hot-rolled (extrusion seamless pipe): billet, heating, perforation, three roll
cross rolling tube, rolling or extrusion, tube, diameter (or reducing), cooling, straightening, pressure test
(or testing), marking, raw materials storage rolling seamless pipe is round billet, embryo after cutting
machine cutting the growth of about 1 meters of the blank pipe, and the conveyor belt to the furnace
heating billet is fed into the heating furnace,
The temperature is about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The furnace
temperature control is the key problem. Round billet released after pressure punch through the air. Are
generally more common puncher piercer, this machine has high production efficiency, good product
quality, hole diameter enlargement, can wearing a variety of steels. After perforation, round tube has
been three roll cross rolling, rolling or extrusion. The extrusion to take off pipe sizing sizing machine.
Through the high-speed rotation of the cone drill into the billet punch forming tube. Pipe diameter by
sizing machine drill diameter length to be determined after sizing steel tube. And enter the cooling tower,
the water cooling pipe, after cooling, it is necessary to straightening.
Pipe by straightening by the conveyor belt to the metal detector (or hydrostatic test) for internal
inspection. Steel pipe internal cracks, bubbles and other problems will be detected even after the pipe
quality inspection. Through the strict quality inspection of steel pipe manual selection. After using spray
paint on the number, size, production batch. And by crane into the warehouse.
2 cold drawing (rolling): seamless steel billet, heating, perforation, head, annealing, pickling, oil pipe
(copper), multi pass drawing (cold rolling) to the tube, heat treatment, straightening, pressure test
(testing), marking and warehousing. Cold drawing (rolling) method for rolling seamless steel pipe than
hot-rolled (extrusion seamless pipe) complex. Their production process is basically the same.
The first three steps are different from the beginning of the fourth steps, the circular tube was empty to
begin, annealing. After annealing and pickling to use a special acidic liquid. After acid pickling oil. Then
followed by a multi pass drawing (Leng Zha) and the blank pipe, specialized heat treatment. After heat
treatment, it is necessary to straightening.
Pipe by straightening sent by conveyor metal detection (or machine Hydrostatic test) internal testing.
Steel pipe internal cracks, bubbles and other issues, will be detected. But also through strict quality
inspection of steel pipe quality inspection manual selection. After using spray paint on the number, size,production batch. And by crane into the warehouse