Description:

This specification has been approved for use by agencies of the Department of Defense.

Consult the DoD Index of Specifications and Standards for specific year of issue which has been adopted by the Department of Defense.

Size (mm): O.D.:6.0-114.0 W.T.:1-15 L:max 12000

Delivery Condition : As different requirements,It including pickling,etc. > Test:

1.Hydrostatic or Nondestructive Electric Test

2.Heat Treatment:Min temperature 650.

3.Surface Condition:Free of scale,A slight amount of oxidation will not be considered as scale.

4.Flattening Test,Flaring Test.Flange Test,Hardness Test,Hydrostatic Test

Features Specifications

Material Comparison Tables (ASTM ℃KS, JIS, DIN, BS, NBN, NF, UNI)

ASTMA 192M / ASME SA-192M Chemical Compositions(%)

ASTM A 192M / ASME SA-192M Mechanical Properties

JIS Number and Corrensponding Foreign Standards

Scope:

1. This specification covers minimum-wall-thickness, seamless carbon steel boiler and superheater tubes for high-pressure service.

2. The tubing sizes and thicknesses usually furnished to this specification are 1/2 in. to 7 in. [12.7 to 177.8 mm] outside diameter and 0.085 to 1.00 in. [2.2 to 25.4 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

3. Mechanical property requirements do not apply to tubing smaller than 1/8 in [3.2 mm] inside dimeter or 0.015 in. [0.4 mm] thickness.

4 When these products are to be used in applications conforming to ISO Recommendations for Boiler Construction, the requirements of specification A 520 shall supplement and supersede the requirements of this specification.

5. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?

Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.

Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.

Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.

Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.

Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.

Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.

Condition on delivery:

It refers to the state of final plastic deformation or final heat treatment of the delivered product. The hot-rolled or cold drawn (rolled) state or manufacturing state generally delivered without heat treatment; the heat-treated state after heat treatment delivery, or the normalizing, tempering, solid solution, annealing according to the type of heat treatment status.

Delivery according to actual weight or delivery according to theoretical weight

• Actual weight - at the time of delivery, the weight of its product is delivered according to the weighing (weighing) weight;
• Theoretical weight - The weight of the product at the time of delivery is calculated from the nominal size of the steel.