Technical Standards for Stainless Steel Bellows

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Technical standard:

  1. The type, base wood parameters and dimensions of the bellows should meet the requirements of JB1111-68 “Type, basic parameters and dimensions of ring-shaped single-layer metal bellows”.

And manufactured in accordance with the technical documents approved by the prescribed procedures.

  1. The material of the bellows should be brass H80, tin phosphor bronze QSn6.5-0.1, iron bronze QBe2 and stainless steel 1Cr18Ni9Ti (if there are special requirements,

After the agreement between the ordering party and the manufacturer, other materials can be used).

  1. The stiffness of the bellows should meet the requirements in the JB1111-68 standard.
  2. The zero offset of the bellows under the allowable displacement shall not exceed the regulations in Table
  3. The bellows should ensure air tightness.
  4. The bellows should be guaranteed to work normally within the pressure resistance range specified in the JB1111-68 standard.
  5. The shape error of the bellows shall not exceed the regulations in Table 3:
  6. The surface state of the bellows should be:

(1) Copper alloy bellows hose are allowed to be passivated surface and uniformly oxidized (dark-colored) surface obtained after temperature stabilization or aging treatment;

(2) Stainless steel vacuum bellows are allowed to be polished and sandblasted.

  1. The outer surface of the bellows should be free of defects such as scratches, cracks, dents, inclusions and rust; slight traces on the parting surface of the forming mold are allowed.
  2. For special performance requirements, it can be specified separately through the agreement between the ordering party and the manufacturer.
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