About us

    Welflow is a combined company of four factories whose products are complementary to each other. In addition to the mainland China market, the products are exported to South Korea, Taiwan(China), the United States, Singapore, Malaysia, Australia, and other countries and regions.
  • 2019-11-27

1. Fluid Media
This series of products are used for ordinary piping for steam, air, water, oil, and gas. (except flammable or toxic gas).

2. Pressure-Temperature Ratings

Temperature ℃ -20-40 100 150 200 220
Non-shock Max(Working Pressure) 2 1.65 1.5 1.4 1.35

Note 1: Pressure for intermediate temperatures may be determined by the interpolation method.

Note 2: Temperatures indicated are those of internal fluid.

Note 3: Piping loads, stresses, and moments are not taken into account.

3. Material Standard

Casting

Nation GB JIS KS DIN ASTM
Steel

ZG07Cr19Ni9, ZG07Cr19Ni11Mo2

SCS13A,SCS14A SCS13A,SCS14A 1.4308,1.4408

CF8,CF8M

Standard GB/T2100 JIS G5121 KS D4103 DIN 17445 ASTM A351

Pipe

Nation GB JIS KS DIN ASTM
Steel 06Cr19Ni10, 022Cr19Ni10, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2 SUS304TP, SUS304LTP, SUS316TP,SUS316LTP SUS304TP, SUS304LTP, SUS316TP, SUS316LTP

1.4301,1.4307,

1.4401,1.4404

TP304,TP304L,

TP316,TP316L

Standard GB/T14976 JISG3459 DIN17456 ASTM A312

4. Thread Standard

Nation GB JIS KS DIN BS ASTM
Thread R, Rc, Rp, G PT, PF PT, PF R, Rp BSPT,BSP NPT, NPSC
Standard

GB/T7306,

GB/T7307

JIS B0203,

JIS B0202

KS B0221,

KS B0222

DIN2999 BS21 ANSI/ASME B1.20.1

5. Installation Precautions

a. Before installation, please confirm that the material, thread, and pressure of the product conform to the standard. Whether it is in conformity with the installation environment or regulations in order to avoid a safety accident.

b. Before installation, please check whether the product is clean, so as to prevent the foreign objects from falling into the pipe or attaching to thread.

c. If the sealant is used for sealing, please note that do not let it get into the pipe when installing.

d. Select the correct wrench when installing in order to prevent deformation or damage to the pipe fittings.

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