1. Nneɛma titire, nnwinnadeɛ ne nneɛma a wɔde di dwuma wɔ adansiɛ no mu ne mfiridwuma ho nkrataa a ɛkyerɛ sɛ nneɛma yɛ papa anaa adansedie krataa a ɛfa nneɛma a wɔyɛ no ho a ɛne mprempren ɔman anaa asomfo gyinapɛn hyia.
2. Nnyɛ nhwehwɛmu a ɛho hia sɛ ɛyɛ papa sɛnea ɛho hia ansa na wode valve ahyɛ mu.
3. Nkyerɛkyerɛmu ne model a ɛwɔ valve a wɔde ahyɛ mu no ntumi nhyia design ahwehwɛde ahorow no. Sɛ nhwɛso no, nhyɛso a wɔfrɛ no valve no sua sen nhyehyɛe no sɔhwɛ nhyɛso no; sɛ nsuo a wɔde ma baa dwumadibea paipu no paipu ntwemu sua anaasɛ ɛne mm 50 yɛ pɛ a, wɔde gate valve no di dwuma; wɔde stop valve no di dwuma ma nsu a ɛyɛ hyew a wɔde yɛ ɔhyew paipu a ɛyɛ dry ne vertical; wɔde butterfly valve no yɛ ogya pɔmpɛ no nsu a wɔtwe paipu no.
4. Ɔkwan a ɛnteɛ a wɔfa so de valve si hɔ. Sɛ nhwɛso no, nsu (nsuonwini) a ɛsen no kwankyerɛ a ɛwɔ stop valve anaa check valve no ne sɛnkyerɛnne no bɔ abira, wɔde valve stem no si fam, wɔde check valve a wɔde asi hɔ tẽẽ no si hɔ tẽẽ, rising stem gate valve anaa butterfly valve no nsa nni baabiara a wobetumi abue na wɔato mu, na valve stem a ɛwɔ concealed valve no nhwɛ inspection valve no.
5. Ordinary valve flange na wɔde di dwuma ma ntontom valve flange.
6. Tokuru a wɔde asie ne afã horow a wɔde ahyɛ mu nni ɔdan no dan no si mu, anaasɛ ntokuru a wɔakora so no kɛse sua dodo na wɔanhyɛ afã horow a wɔde ahyɛ mu no agyirae.
7. Wɔ paipu welding mu no, staggered joint a pipes akyi butt joint nni mfinimfini line so, wonnya gap biara mma butt joint, wontwa groove biara mma thick wall pipes, na weld no trɛw ne ne sorokɔ ntumi nhyia ahwehwɛde ahorow a ɛwɔ adansi ho nkyerɛkyerɛmu mu.
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9. Nneɛma a wɔde yɛ ntrɛwmu bolt a wɔde besiesie paipu no nnyinaso no nyɛ papa, tokuru no kɛse a wɔde si ntrɛwmu bolt no mu no sõ dodo anaasɛ wɔde ntrɛwmu bolt no ahyɛ birikisi fasu no so anaa mpo kanea fasu no so.
10. Ahoɔden a flange plate ne gasket ma pipeline nkitahodi no nnɔɔso, na nkitahodi bolt no yɛ tiaa anaasɛ diameter no yɛ teateaa. Wɔde rɔba pad yɛ ɔhyew paipu, wɔde asbestos pad yɛ nsuonwini paipu, wɔde double-layer pad anaa bevel pad di dwuma, na flange pad pue kɔ paipu no mu.
11. Wɔ hydrostatic ahoɔden sɔhwɛ ne tightness sɔhwɛ a ɛwɔ pipeline nhyehyɛe no mu no, nhyɛsoɔ boɔ ne nsuo dodoɔ nsakraeɛ nko ara na wɔhunu, na nsuo a ɛretu no nhwehwɛmu no nnɔɔso.
12. Ɛsɛ sɛ wɔde nsuo fĩ, osuo nsuo ne condensate paipu sie a wɔrensɔ nsuo a wɔato mu nhwɛ.
13. Wɔnhohoro nsuo afiri nhyehyɛeɛ no mu yie ansa na wɔawie, na nsuo a ɛsen ne ahoɔhare no ntumi nni ahwehwɛdeɛ a ɛfa nsuo afiri a wɔde hohoro ho no ho dwuma. Ɛde nsu ahoɔden sɔhwɛ no mpo di dwuma de yi nsu sen sɛ ɛbɛhohoro mu.
14. Yɛ nsuo nhyɛsoɔ sɔhwɛ wɔ ɔhyew a ɛnyɛ papa ase wɔ awɔw bere mu adansi mu.
