pipe seamless carbon steel

Features of pipe seamless carbon steel :

• A large stock of pipes ready for call-off 
• Pipes manufactured to specified dimensions on request 
• Pipes can be produced in high quality alloys 
• Pipes can be supplied in a variety of finishes 
• Pipes can be cut to size on our premises ready for immediate supply 
• Worldwide shipping 
• Pipes produced to ISO 9001:2000 quality specification 

Specifications of pipe seamless carbon steel :

1. Grade: 316L
2. OD range:  6mm-762mm 
3. Wall thickness range:  0.5-50mm 
4. Length: max.18000mm or as demand
5.Standard:   GB/T14975-2002,GB/T14976-2002,GB13296-2007
GB9948-2006,GB5310-95
ASTM A312,ASTM A213,ASTM A269,ASTM A511
ASTM A789,ASTM A790
JIS3463,JIS3459,
DIN2462,DIN17458,DIN17456
6.Surface finish:  Polishing (180#,220#,240#,320#400#,600#), Hairline, aid pickling and so on
7. Manufacture technology: cold drawn/cold rolled/hot rolled

Applications of pipe seamless carbon steel : 

A) General Service Industries (Petroleum, Food, Chemical, Paper, Fertilizer, Fabric, Aviation and Nuclear) 
B) Fluid, gas and oil transport 
C) Pressure and Heat Transmission 
D) Construction and Ornament
E) Boiler Heat Exchanger

The use of seamless stainless steel pipe has expanded into new applications, such as light industry, foodstuff, home electric appliances, kitchen articles, construction and decorations, railroad vehicles; some seamless stainless steel pipe/tube which has excellent corrosion resistant, mechanical properties are suitable to produce general purpose parts, cutting tools, mechanical parts, petroleum refining equipment, bolts and nuts, pump rods, and kitchenware.

Manufacturing Process of pipe seamless carbon steel :

The process commences with the formation of welded mother tube on the tube mill from imported and tested prime quality stainless steel strips. The latest TIG multi electrode welding technique is employed for superior weld quality and 100% Fusion, with argon purging, No filler metal added.

These mother tubes are solution annealed at 1060 D. 1100 D. C in continuous annealing furnace followed by immediate quenching to prevent chromium carbide precipitation.

Annealing of mother tuber ensures:
A) Removal of stress induced during tube forming and cold drawing:
B) Sufficient ductility and softness for cold drawing:
C) Transformation of the weld zone to austenitic nature,
D) Re crystallization of metallic grains to original form and thereby improving corrosion resistance.

During annealing, scales are formed on the surface of the tubes. In order to remove these, the tubes are pickled by immersing into hot pickling solution made of nitric acid, sulphuric acid and hydrofluoric acid.

The tubes are then coated with proper lubricant and then cold drawn over a drew bench: 
1) To vary the metallurgical structure and restore the properties to the parent material:
2) To achieve a tube having closer dimensional tolerances:
3) To achieve a tube having closer dimensional tolerances:
4) To produce tubing of smaller size and wall thickness.
5) To reorient the grain structure of weld portion with that of the parent material and
6) To remove/minimize the internal bead.

Drawing is followed by subsequent annealing and pickling to restore the properties of the entire tube to that of the parent material. The tubes are then passiated to impart extra corrosion resistance. Thereafter every tube is electrically marked with material grade, size and manufacturing standard.

Technical notes:

Chemical composition of 316L

Normal Tolerence of Seamless Stainless Steel Pipe/Tube :

SMC's promise: 

As the word leading manufacturer and supplier, Shanghai Metal Corporation makes“Service,Management,Craftsmanship."  In our commitment to deliver world class service, SMC's Quality Control Department not only promise to provide the best quality products, excellent customer services,  fast and reliable deliveries, and reasonable prices; but also goes the extra step to provide environment conscious products that will improve lives.

Our Products:

Package of  st35 5 seamless carbon steel tube

Please don’t worry that our products are packed, stored, transported according to the international regulation. We do care about the quality of our products; even some little details are paid attention to.
We wrap the stainless steel products with anti-rust paper and steel rings to prevent damage. Identification labels are tagged according to standard specification or customer's instructions. Special packing is available as per customer's requirement.
Plus, our storage racks are made of wood. Other kinds of metals are settled in other places, far from the stainless steel. Any unwanted chemical reaction can be prevented.

Export Markets
Our target market is the international market. Every year we export most of products to countries like India, Pakistan, South Korea, Brazil, Australia, South Africa, Spain, Sri Lanka, Taiwan, Hong Kong, etc.