Stainless Steel Seamles Pipe 304 ASTM A312

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1、Structure of Stainless Steel Seamles Pipe 304 ASTM A312 Description:

Stainless seamless pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell. As the manufacturing process does not include any welding, seamless pipes are perceived to be stronger and more reliable. Historically seamless pipe was regarded as withstanding pressure better than other types, and was often more easily available than welded pipe.

2、Main Features of the Stainless Steel Seamles Pipe 304 ASTM A312:

• High manufacturing accuracy

• High strength

• Small inertia resistance

• Strong heat dissipation ability

• Good visual effect

•Reasonable price 

3、Stainless Steel Seamles Pipe 304 ASTM A312 Images:

4、Stainless Steel Seamles Pipe 304 ASTM A312 Specification: 


Lists of Standard


Applicable Code No.


Steel Grade






A213, A269, A312, 

A789, A790, B677, A268

TP304/L/H, TP310/S/H, TP316/L/H/Ti, TP317/L, TP321/H, TP347/H, S31803, S32205, S32750,

S32304, S31500, TP904L, TP410, TP430, TP405, TP409/409L





SA213, SA312, SA789,

SA790, SB677

TP304/L/H, TP310/S/H, TP316/L/H/Ti, TP317/L, TP321/H, TP347/H, S31803, S32205, S32750,

S32304, S31500, TP904L






JIS G3459, JIS G3463





EN 10216-5,

DIN 17456, DIN 17458

1.4301, 1.4307, 1.4541, 1.4878, 1.4401, 1.4404,1.4571,1.4550,1.4438, 1.4436,1.4435, 1.4462, 1.4539, 1.4912, 1.4362



 G B13296

G B/ T14976














S.S Seamless




3.17mm –



0.5mm –



Max. 22m




A213, A269, A511, A789; SA213, SA789, B677, SB677; JIS G3463; EN 10216-5


S.S. Seamless



10.29mm –



0.89mm –



Max. 18m




A312, A790, SA312, SA790, 

JIS G3459, EN  10216-5



S.S. Seamless




15.88mm –




0.89mm –




Max. 25m



1.5 x OD 

  To  1000mm

A213, A789, SA213, SA789, B677, SB677, JIS G3463, EN

10216-5, SA688


   (1)  Hydro-Static Test  

      (2)  Non-Destructive Test

      (3) Ultrasonic Test       

      (4)Eddy-Current Test

5、FAQ of Stainless Steel Seamles Pipe 304 ASTM A312:


How is the quality of your products?
    Our products are manufactured strictly according to national and internaional standard, and we take a test on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

How about price?
    Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

Why should you chose us?
    Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.


Any question, pls feel free to contact us !

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Q:What's the difference between stainless steel 304 and stainless steel 202?
Different chemical composition. 304 of the nickel is much higher than 202.
Q:Does stainless steel pipe belong to hardware?
It belongs to me. Stainless steel pipe belongs to the category of hardware in the steel, and stainless steel pendants, flat iron is more hardware. All belong to steel alloy.
Q:310 stainless steel resistance to high temperature?
Application example: good oxidation resistance
Q:Disadvantages of stainless steel tubes
A more traditional but more expensive pipeline material, durable and more convenient construction. Copper is the first choice in many imported bathroom products. Price is the most important reason for its use, in addition, copper corrosion is also a factor.
Q:How can the inner walls of stainless steel tubes be polished?
Electropolishing is thrown to the workpiece as anode, insoluble metal poles at the same time as the cathode, immersed into electrolytic cell, with the direct current produced anodic dissolution selectively, so as to achieve the surface brightness increasing effect. Specific can be used to search "what is electrolytic polishing" can understand!
Q:Stainless steel pipe pickling ratio
Features: sticky green and blue transparent paste, dirt removal ability, fast and convenient, especially suitable for large workpieces, equipment, partial or overall treatment, not suitable for liquid immersion, better than the market similar products.
Q:Stainless steel welded pipe or seamless pipe expensive?
Stainless steel is generally divided into three categories: martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation hardening stainless steel. The price is roughly the same order as stainless steel. But each category has a cheaper and more expensive one, and the difference can be great.
Q:Stainless steel and stainless steel pipe inside and outside polishing off, what is the difference?
The inside and outside polishing tubes are polished by the surface of the polished material, and they look like bright ones, just like the mirror surface. Mainly used in viscous liquid and gas moving equipment, such as printing and dyeing, pulp and other industries
Q:What's the difference between cold drawn steel tube and hot rolled steel tube?
Cold drawn steel tubes are produced by drawing, extruding, piercing and the like. The whole steel pipe has no seams. It's a round, square, rectangular steel with a hollow cross section without any seams. It is made of steel ingot or solid pipe blank by piercing and then made by cold casting.
Q:What are the differences in the properties of hot-rolled and cold-rolled stainless steel tubes?
From the current market, cold working processing method has been basically eliminated the hot working mode, this is caused by defects in thermal processing of stainless steel pipe: thermal processing of stainless steel tube, as in the case of heating, a molding, molding the mechanical properties of the stainless steel tube is relatively poor, so the tube doing mechanical processing will often cannot meet the needs of mechanical and physical properties.

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