Reducer Concentric, Diam:10"x8" ,Sch: S-40S/S-10ASME B16.9 ASTM A403-SMLS Gr. WP316L(UNS S31603).

Reducer Concentric, Diam:10"x8" ,Sch: S-10S/S-10S ASME B16.9 ASTM A403-SMLS Gr. WP316L(UNS S31603)..

brief introduction

The big and small heads whose center is in a straight line are called concentric big and small heads. The commonly used forming process is reduced diameter pressing, expanded diameter pressing or reduced diameter plus expanded diameter pressing. Stamping can also be used for reducing pipes of some specifications.

distribution characteristics

(1) The bending moment caused by the area pressure difference between the large and small ends of concentric reducer under the action of internal pressure causes the relative opening of the large end and the relative contraction of the small end;

(2) Under the action of internal pressure, the circumferential stress on the inner surface of the large end on the eccentric side and the outer surface of the middle part on the eccentric side of the eccentric reducer is the largest.

Corrosion resistance

General corrosion

Compared with 18-8 stainless steel, 316L and 317L have better corrosion resistance in atmospheric environment and other mild environments. Generally speaking, media that do not corrode 18-8 stainless steel will not corrode the grade containing molybdenum. The only exception is high oxidizing acids, such as nitric acid. Stainless steel containing molybdenum has weak corrosion resistance to this acid. In sulfuric acid solution, 316 and 317L have better corrosion resistance than other chromium nickel types. Both grades have good corrosion resistance to high concentration solutions at temperatures up to 120 ° f (38 ° C). Of course, testing during use is essential because operating conditions and acidic contaminants can seriously affect the corrosion rate. When concentrating sulfur-containing gas, these two grades have better corrosion resistance than other types of stainless steel. However, in such applications, the effect of acid concentration on corrosion rate is quite large, which should be carefully considered. Molybdenum containing stainless steel 316 and 317L have certain corrosion resistance to other environments. The following corrosion data show that these alloys show superior corrosion resistance in boiling 20% phosphoric acid solution. They are also widely used in the treatment of thermal organic acids and fatty acids. Stainless steel containing molybdenum is usually used in the manufacture and treatment of food and pharmaceutical products, because metal pollution should be minimized. Generally speaking, under the same environmental conditions, 316L can be regarded as equivalent to 317L. However, in the environment that can cause intergranular corrosion in welding and heat affected zone, it is an exception. In such media, 316L and 317L are more often selected because they have low carbon content and can improve intergranular corrosion resistance.

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Reducer Concentric, Diam:10"x8" ,Sch: S-40S/S-10ASME B16.9 ASTM A403-SMLS Gr. WP316L(UNS S31603). Images