Concentric size head is also known as the seamless size head, pressing the size head.

The size of the center of the circle in the same line is called the concentric size head.

Product specifications: 3/4"X1/2"- 48"X40" [DN20X15-1200X1000]

Wall thickness: sch.5s --160

Standard: national standard, American standard (ANIS), daily standard (JIS), British standard (BS), German standard (DIN), Italian (UNI), etc

Material: carbon steel, stainless steel, alloy steel

Packaging: avoid fumigating wooden cases and pallets can be packaged according to customers' requirements.

Products: petroleum pipeline engineering, natural gas pipeline engineering, chemical plant, power plant, shipyard, pharmaceutical, dairy, beer, beverage, water conservancy etc

(1) because when stamping die to ensure the stamping precision of size and shape, and generally does not destroy the surface of the stamping parts quality, and the life of the mould are long, so the quality of stamping not disorderly, good compatibility, has the characteristics of "the same".

(2) the stamping generally does not have the raw material, the material is consumed less, and the other heating equipment is not needed, but is a kind of province material, the energy-saving processing method, the stamping parts of the lower money.

(3) stamping for processing the size range is larger, more complex shape parts, such as small to watch the stopwatch, big to auto longeron, cover parts, etc., and stamping material hardening effect of cold deformation, the strength and stiffness of stamping was high.

The quality of concentric size head shall meet the requirements of GB/t12459-2005 of the current national standard "steel welded seamless pipe" and shall meet the following requirements:

(1) the appearance of the size head should not be cracked or heavy, and the wall thickness should be greater than the wall thickness of the large diameter end pipe section.

(2) the roundness of the size head should not be greater than 1% of the corresponding outer diameter and the allowable deviation is plus or minus 3mm; The center line of the concentric reducer should coincide, and its eccentricity should allow the deviation to be plus or minus 5mm.

(3) the allowable deviation shall be in accordance with the provisions of table 4.2-3.