Astm a691standard specification for electric - fusion - welded carbon and alloy steel tubing for high temperature and high pressure service conditions.
Scope of application
Astm a691 standard for high temperature, high pressure steel pipe, from several chemical composition, strength grade and pressure vessel quality steel plate, with the addition of filler metal melting welding. In order to obtain the desired performance or to meet the requirements of the application specification, no heat treatment may be required.
Astm a691standard is generally applicable to the outer diameter of not less than 16in (405mm) and wall thickness greater than equal to 1 / 4in (6.4mm) of the steel pipe.
Astm a691 grade 1.25 cr alloy steel pipe for high temperature and high pressure service conditions.
Astm a691 grade 1.25 cr alloy steel pipe specification [standard]astm a691.
[material]grade 1.25 cr.
[size]1/2"nb-24"nb.
[thickness]sch20, sch30, sch40, std, xs, sch60, sch80, sch120, sch140, sch160, xxs.
[length]6m or specified length as required.
[ends]plain end, beveled end, treaded
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1. Current overload or line surge shutdown 2. High temperature compressor shutdown. 3. High pressure alarm shutdown. 4. Low pressure alarm shutdown. 5. Low oxygen cocentrator alarm. Oxygen concentrator: 0.5-5L/min Purity: 95%+_3% Working system Continuous Power Supply AC230V.50Hz/AC220V.60HZ AC120V.60Hz Power: 390VA Net Weight: 16kg( Gross weight: 18.5kgs) Warranty: Long-life compressor designed for 1000 hours of maintenance-free use. Size: 33*26*54cm