Carbon Steel DN10 SCH5-SCH160 Cap

Cap other name: head, plug, LIDS, pipe cap, stop.English (Pipe cap) USES: welding on the Pipe end or installed outside the Pipe thread to cover wall Pipe fittings.Use closed pipeline, function the same as the tube wall.Closure phase in the form of close, only the blind flange can be sealed, sealing, and welded tube cap is not detachable.Pipe cap [1], including convex cap, conical shell, variable diameter section, the design of the flat cover and tighten.
Convex tube caps include: hemispherical tube cap, oval tube caps, disc pipe cap and QiuGuanXing cap.From the standpoint of stress, convex cap in the gradually from hemispherical tube cap is not good, but look from the manufacturing difficulty, good manufacture gradually.
304 l Stainless Steel: 304 316 316 l, 321, 2520, 310, 316, such as material.
Size: DN15-48 ")
Wall thickness: SCH5 - SCH160
Standard: ASME DIN JIS BS GB/T JB SH HG, specific as follows: GB/T12459-2005, GB/T13401-2005, ASME B16.9, SH3408,
SH3409, HG/T21635, DL/T695, SY/T0510, DIN2617
USES: water, beverages, beer, food, petrochemical, nuclear power, chemical fertilizer, shipbuilding, machinery, medical equipment, waterproof processing, pipeline, etc
Packing: packed in wooden cases, cartons
Disc cap r, avoid joining together, will be thinned and high stress.
Splice weld direction when asked to only allow is radial and ring.After large cap may cancel this request.Stitching distance requirements, for more than 3 g, and not less than 100 mm (welding heat affected zone is high stress zone, and in the chemical composition of the area will be a loss. So to avoid the high stress area, the area and thickness. According to the practical experience, the stress attenuation length is greater than 3 g, and not less than 100 mm).But refrigeration equipment is difficult to meet the requirements, has its particularity.
Thebutt welds joining together after forming the head, should be 100% rays or ultrasonic testing, the qualified level with the equipment shell.Finally forming the same welding seam detection level, scale and equipment shell, high waste.Half spherical head, for example: if the shell is 20% testing equipment, qualified III.The straight stitching and final weld, III qualify, welded joint coefficient is 0.85;
If the equipment shell is 100% inspection, II qualification.The straight stitching and final weld is unqualified, II welding joint coefficient is 1
So straight stitching, although 100% inspection, qualified level, along with the housing.
But must pay attention to the process manufacturing process:
The correct way is: blanking (line) - small plate together into a big board - molding - nondestructive testing
If it's wrong to do testing before molding, guarantee the forming after the quality of the products.That is nondestructive testing refers to the nondestructive testing.

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