40 мм 2 дюйма PN3.2 EN1092 1 Type05 BL желтый лак лучшее качество сварки шеи фланец для соединения труб

1. Quality assured.

2. Prompt response.

3. Competitive price.

4. Solid package.

5. Fast delivery.

6. Excellent after-sale service.

7. E-catalogue is available.

1. Terms of payment: T/T, L/C.

2. Terms of shippment: by air, by sea, by train.

3. Date of delivery: depend on the quantity.

4. Packaging: polywood carton or fumigation-free pallet.

5. Certificates: API/TUV/ISO9001.

6. MOQ: none.

7. Port of loading: Tianjin Xingang, China.

8. Supply ability: 200 tons per week.

9. Common flange execution standard:

National standard flange:GB/T9112-2010 (GB/T9112~9124-2010)
American standard flange:ANSI B16.5 Class150,300,600,900,1500(WN,SO,BL,TH,LJ,SW)
Japanese standard flange:JIS 5K,10K,16K,20K(PL,SO,BL,WN,TH,SW)
German standard flange:DIN2573,2572,2631,2576,2632,2633,2543,2634,2545
Chinese Chemical Industry standard:HG/T20592-2009,HG5010-52~HG5028-58,HGJ44-91~HGJ65-91,HG20615-97
Chinese Ministry of Machinery standard:JB81-59~JB86-59,JB/T79-94~JB/T86-94,JB/T74-1994
Chinese pressure vessel standard:JB1157-82~JB1160-82,JB4700-2000~JB4707-2000 B16.47A/B B16.39 B16.48

10. The following information is required for customized flanges:

Nominal diameter, nominal pressure, implementation standard, sealing surface type, material;if it is special-shaped flange, please provide drawings.

11. Reasons and countermeasures for acid pickling corrosion of 304 stainless steel flanges:
(1) The corrosion of stainless steel flanges is the result of a combination of multiple factors, among which the first phase precipitated at the material grain boundary is the main cause of flange failure. It is suggested that the heating temperature should be strictly controlled during hot working, not exceeding the upper limit temperature of the material heating process specification. At the same time, it should be cooled quickly after solution to avoid staying in the temperature range of 450 ℃ - 925 ℃ for a long time and prevent the precipitation of the third phase particles.
(2) The mixed grains in the material are prone to electrochemical corrosion on the surface, and the forging ratio should be strictly controlled during the forging process.
(3) The low content of Cr element and high sulfide content in the material directly affect the corrosion resistance of the flange. When selecting materials, attention should be paid to selecting materials with pure metallurgical quality.

12. The difference between 304 stainless steel and 316L stainless steel:

316L stainless steel contains Mo, which has better corrosion resistance than 304 stainless steel in high-temperature environments. Therefore, engineers generally choose components made of 316L material (or other more high-temperature resistant materials) in high-temperature environments. The alloy element ratios of 304 stainless steel and 316L stainless steel are different. 316L mainly increases the proportion of Ni content, thus its corrosion resistance is stronger than 304, making it more suitable for use in chemical, seawater and other environments. The cost of 316L is higher than 304. 304 stainless steel is a more common pipe fitting. 316L stainless steel is generally used in scenarios that require better resistance to intergranular corrosion and welding processing performance.

13. What does flange code PL100B PN16 RF 20# HG/T20592-2009 mean:
PL is code for flat welded flange
100 is the flange through 100 series
(B) refers to Series B flanges, DN100 Series B piping Φ108
PN16 refers to the pipe with flange matching maximum pressure,PN16 is 16kg pressure, or PN1.6Mpa
RF refers to the sealing surface of the flange as a protruding surface (RF)
20# refers to the material of the flange is 20# steel
HG/T20592-2009 is the executive standard for flanges in Chinese Chemical Industry.