Titanium rod / wire material storage requirements for the warehouse environment

At present, with the increasing demand for titanium and titanium alloy pipe fittings in the petroleum, chemical, textile and other industries, the use of seamed titanium pipe fittings has been equivalent to the use of seamless pipe fittings, while the domestic titanium and titanium alloy seamless and There is no applicable national standard for welded pipe fittings, so it is urgent to establish national standards to regulate the quality of titanium and titanium alloy seamless and welded pipe fittings. This standard is formulated on the basis of referring to the above-mentioned standards and accumulating on the basis of years of use and production experience.

1. The scope of application of titanium alloy pipe fittings is specified, and the size is consistent with ASME B16.9: 2007 "Forged Steel Butt Welded Pipe III Fittings Made in Factory" from DN15 to DN1200;

2. The relevant symbols of titanium alloy pipe fittings are specified, and they are consistent with the current standard symbols for steel pipe fittings;

3. The classification, common materials, dimensions and tolerances, manufacturing, surface quality and non-destructive testing of titanium alloy pipe fittings are stipulated; the category and code of titanium alloy pipe fittings are basically the same as those of ASME and steel pipe fittings national standards. The only difference is that there are seams. The pipe fitting code is to add the letter "W" before the seamless pipe fitting code, which is not used in the national steel pipe fitting standard, but it is stated in ASME SB-363; the marking example is consistent with the steel pipe national standard; According to HG/T 3651-1999 "Titanium Butt Welding Seamless Pipe Fittings" and the latest titanium material standards, the commonly used titanium grades and related standards are specified; the dimensions and tolerances of titanium alloy pipe fittings are based on ASME SB-363 "Seamless and Welded non-alloy titanium and titanium alloy welded pipe fittings" and ASME B16.9: 2007 "Factory-made forged steel butt-welded pipe fittings"; individual dimensions are slightly different from the national standards for steel pipe fittings, such as DN20 pipe fittings "Outer diameter at the mouth", GB/T 12459 is "26.9mm", and this standard is "26.7mm". According to HG/T 3651-1999 "Titanium Butt Welding Seamless Pipe Fittings", GB/T 12459 "Steel Butt Welding Seamless Pipe Fittings", GB/T 13401 "Steel Butt Welding Seamless Pipe Fittings", ASME SB-363 "Seamless "Unalloyed Titanium and Titanium Alloy Welded Pipe Fittings Welded and Welded" and the experience accumulated in the manufacturing and use conditions stipulate the requirements of titanium alloy pipe fittings manufacturing, surface quality and non-destructive testing.

4. According to GB/T 12459 "Steel Butt Welding Seamless Pipe Fittings", GB/T 13401 "Steel Butt Welding Pipe Fittings" and ASME B16.9: 2007 "Forged Steel Butt Welding Pipe Fittings Made in Factory", the design of titanium alloy pipe fittings The verification test (including its procedures, methods, availability of results, coverage and requirements), product tests and test methods are specified;

5. Provisions are made for the inspection and acceptance, batching, inspection items and determination of inspection results of titanium alloy pipe fittings;

6. The requirements for marking, packaging, transportation and storage of titanium alloy pipe fittings are specified;

7. It specifies the content that should be included in the contract or purchase order when ordering titanium alloy pipe fittings.

The biggest advantage of alloy pipe fittings is that they can be recycled 100%, in line with the national strategy of environmental protection, energy saving, and resource saving. The national policy encourages the expansion of the application areas of alloy pipe fittings. At present, the consumption of alloy pipe fittings in my country accounts for only half of the total amount of steel in developed countries. The expansion of the use of alloy pipe fittings provides a broader space for the development of the industry.
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