Dị ka pipeline njem dị mkpa, a na-eji ọkpọkọ igwe anaghị agba nchara na mmanụ ala, gas, ụlọ ọrụ kemịkalụ, ọkụ eletrik na ụlọ ọrụ ndị ọzọ.Mgbe a na-eji ha eme ihe, a ga-enyocharịrị nke ọma iji hụ na ịdịmma na nchekwa nke pipeline dị.Isiokwu a ga-ewebata nyocha nke ọkpọkọ nchara na-enweghị ntụpọ site na akụkụ abụọ: ihe nyocha na ụzọ.

Ihe nnwale gụnyere udi, nha, ogo elu, ihe mejupụtara kemịkalụ, tensile, mmetụta, ịha nhata, flaring, ịgbagọ, nrụgide hydraulic, akwa galvanized, wdg.
Ụzọ nchọpụta
1. Nnwale tensile
2. Mmetụta mmetụta
3. Nnwale flattening
4. Nnwale mgbasawanye
5. Ehulata ule
6. Nnwale hydraulic
7. Galvanized oyi akwa nnyocha
8. Ogo elu na-achọ ka ọ ghara ịdị na-ahụ anya na-ahụ anya, folds, scars, cuts and delamination na n'ime na n'èzí nke ọkpọkọ ígwè.
Na mgbakwunye, a ga-eme nyocha dịka mkpa ndị ahịa si dị, dị kaGB/T 5310-2017enweghị nkebi ígwè ọkpọkọ makannukwu ọkụ ọkụ.
Ngwakọta kemịkalụ: Steel na-enwekarị ihe ndị dị ka chromium, molybdenum, cobalt, titanium, na aluminom, nke nwere ike melite nguzogide okpomọkụ na nguzogide corrosion nke ígwè.
Mechanical Njirimara: Mpụta ike ≥ 415MPa, tensile ike ≥ 520MPa, elongation ≥ 20%.
Nyocha ọdịdị: Enweghị ntụpọ pụtara ìhè, wrinkles, folds, cracks, scratches ma ọ bụ ntụpọ ndị ọzọ dị mma n'elu.
Nnwale na-adịghị emebi emebi: Jiri ultrasonic, ray na ụzọ ndị ọzọ iji nwalee ọkpọkọ ígwè iji hụ na àgwà dị n'ime nke ọkpọkọ nchara enweghị ntụpọ.