Sour Service * Nnwuma Titiriw a Wɔde Di Dwuma

Sour som asekyerɛwɔ pipeline procurement mu no nyɛ "H2S wɔ hɔ" kɛkɛ. Ɛkyerɛ sɛ wɔaka abomH2S fã bi nhyɛso, ɔhyew, pH, ne chloridesbetumi ama hydrogen akɔ dade mu na akanyanSSC/HIC na ɛwɔ hɔ, enti ɛsɛ sɛ nneɛma kwan ne gye a wogye tom ho mmara di sour-som gyinapɛn akyi sen sɛ wobedi line pipe adeyɛ a ɛkɔ akyiri akyi.

Nhwɛsoɔ:Amanneɛbɔ a ɛyɛ nsu a ɛkyerɛ1,000 ppm H2S na ɛyɛ adwumabetumi ahwɛ "moderate," nanso wɔ100 na ɛyɛ barnhyɛso koraa a ɛkyerɛ ase~0.1 bar ppH2S na ɛwɔ hɔ, a emu yɛ den araa ma adwumayɛfo pii betumi ayɛ ahwehwɛde ahorow a ɛfa hardness control ne sour qualification ho no mu den. Nea ɛne eyi bɔ abira no, 1,000 ppm koro no ara wɔ10 baryɛ nkutoo~0.01 bar ppH2S na ɛwɔ hɔ, a mpɛn pii no ɛde gyinaesi soronko koraa ba wɔ nneɛma a wɔbɛtɔ ho mu.
Ɛno nti na sour-som paw no taa yɛ nea...nsu mu nnuruyɛ ho amanneɛbɔne nniso gyinapɛn (mpɛn pii noNACE MR0175 / ISO 15156. Nnipa a wɔte saa)-ne nea enti a Octal Pipe taa bisa ɔsom envelope (ppH2S / pH / temperature) ansa na wɔahyɛ sour-service pipe material package no so dua.

Wɔ oil & gas, petrochemical, offshore, ne high-pressure/high-temperature (HPHT) nnwuma mu no, sour service applications hwehwɛ sɛ wɔhwehwɛ ahwehwɛde a emu yɛ den wɔ steel grade, nnuru a ɛwɔ mu, ɔhyew a wɔde yɛ adwuma, welding quality, coating, ne dimensional tolerances ho. Sɛ wɔanhwɛ so yiye a, nneɛma a atwa yɛn ho ahyia a ɛyɛ akisikuru betumi aka nsu afiri no mudi mu kura, ahobammɔ, ne nkwa nna a wɔde di dwuma kɛse.

Octal Pipe de sour service ne application line pipes soronko a ɛne wiase gyinapɛn ne adansedie a ɛdi kan hyia ma.

Sour som H2S ppmyɛ ade a ɛkyerɛ sɛ obi de n’adwene si biribi so, nansoɛnyɛ n’ankasa nkyerɛkyerɛ sɛnea akisikuru mu yɛ den mu. Dodow no ara sour-service material ahwehwɛde no yɛ nea ɛkanyanH2S nhyɛso fã bi (ppH2S) .efisɛ asiane a ɛwɔ hɔ sɛ wɔbɛpaapae mu no, nea ɛhwɛ sotumi a ɛkanyan hydrogen a ɛkɔ mu, a ɛkɔ soro bere a wɔahyɛ no fã bi no. Wɔ mfiridwuma mu no, ɛsɛ sɛ wɔbom susuw ppH2S ho nepH, chlorides, ɔhyew, ne nsu fã a ɛwɔ hɔ, efisɛ saa nsusuwii ahorow yi nya SSC/HIC susceptibility so nkɛntɛnso kɛse.

Nsakrae a mfaso wɔ so ma gas-fase nhwehwɛmu ne:

ppH2S=(H2S mole fã) × (nhyɛso a edi mũ nyinaa) .

• Sɛ wopɛ gas a wɔde yɛ nneɛma a, .mole fã ketewaa bi ≈ ppm / 1,000,000(ppmv nnyinaso).
• Fa di dwumanhyɛso a edi mũ(ɛnyɛ gauge).
• Unit no nsɛm a wɔakyerɛw:1 bar=100 kPa na ɛwɔ hɔ; 1 psi ≈ 6.895 kPa na ɛyɛ kɛse.

Nhwɛso ahorow a wɔayɛ (ppm koro, ɛsono sɛnea emu yɛ den):

• 1,000 ppm=0.001 na ɛwɔ hɔ.. Wɔ100 na ɛyɛ barnhyɛso nyinaa: ppH2S=0.001 × 100 =0.1 bar na ɛwɔ hɔ.
• Saa ara na ɛte1,000 ppm na ɛyɛ adwumawɔ10 barnhyɛso nyinaa: ppH2S=0.001 × 10 =0.01 na ɛyɛ bar.
• Ɛwom mpo sɛ ppm no yɛ pɛ de, nanso asɛm a ɛto so abien no anya10× ppH2S a ɛba fam, a ɛtaa de nneɛma/sɔhwɛ ahwehwɛde ahorow ba wɔ adwuma no ho nkyerɛkyerɛmu mu.

Nea enti a eyi ho hia ma paipu a wɔbɛtɔ:

Bere a ppH2S kɔ soro no, nnwuma taa yɛ den wɔ nneɛma a ɛma SSC/HIC nsunsuanso ba-taa so no soanohyeto a ɛfa hardness (titiriw weld/HAZ), dade ahotew/inclusion control, ne sour qualification/testing scope a wɔhwehwɛ (HIC/SSC bere a wɔakyerɛ) .. Wei nti na adetɔ ahyɛdeɛ a ɛka sɛ "H2S=X ppm" nko ara no ntaa nnɔɔso sɛ ɛbɛwie sour-service pipe material package. Wɔ nneyɛe mu no, H2S (ppmv anaa mol%), .adwumayɛ mu nhyɛso nyinaa, ahoɔhyeɛ,pH, chlorides, ne sɛ ebia nsu a ɛnyɛ hwee wɔ hɔ anaa. Eyinom so no, wobetumi de ppH2S asi hɔ na wɔde nneɛma kwan (ne nkrataa/sɔhwɛ a wɔhwehwɛ) asi hɔ daa.Octal Pipe taa bisa ɔsom krataa no (ppH2S, pH, ɔhyew, chlorides, ne nsu fã) kan, afei ɔde nneɛma kwan ne nkrataa a ɛkɔ akyiri no hyia gyinapɛn a ɛhwɛ so no sɛnea ɛbɛyɛ a adwuma no betumi asiesie mfiridwuma mu nhwehwɛmu a ɛnkyɛ-stage rework.

Sour ɔsom nneɛma a wɔhwehwɛwɔahyehyɛ no sɛnea ɛbɛyɛ a wobesiw SSC/HIC huammɔdi ano, enti ɛsɛ sɛ nhyehyɛe no kyerɛkyerɛ paipu no mu sɛ asour ɔsom paipu nneɛma a wɔde ahyɛ mu-ɛnyɛ OD/WT ne grade nko. Wɔ nneyɛe mu no, ɛsɛ sɛ ka krataa a wɔde tɔ ade no pefee sɛ:

• Sour gyinapɛn a edi so:NACE MR0175 / ISO 15156 (ne ɔfã bɛn na ɛfa ho), ne adwumayɛfo/adwumakuw no nkyerɛkyerɛmu biara.
• Ɔsom krataa (a wogyina so paw):ppH2S (anaasɛ H2S a ɛwɔ mu + nhyɛsoɔ nyinaa), pH, ɔhyew, chloride, ne sɛ ebia nsuo a ɛnyɛ hwee wɔ hɔ anaa.
• Nneɛma a wɔde di dwuma no kɛse:chemistry control (incl. ahotew/inclusions), steelmaking kwan sɛnea ɛhwehwɛ wɔ spec, ɔhyew ayaresa kwan, ne hardness control nnyinaso.
• Sour sɔhwɛ (bere a spec hwehwɛ):HIC / SSC ahwehwɛdeɛ, mpɛn dodoɔ a wɔfa nhwɛsoɔ, ne gyinapɛn a wɔde gye tom.
• PSL / ahwehwɛde ahorow a wɔde ka ho:s.e., API 5L PSL2 a ɛwɔ sour-service supplementary ahwehwɛde ahorow wɔ baabi a ɛfata.
• Weld/HAZ control (sɛ wɔma kwan ma wɔde weld paipu yɛ a):weld seam NDT scope ne hardness/qualification ahwehwɛdeɛ biara a project ITP no twe adwene si so.

Sɛnea Octal Pipe boa sour-service adetɔ:Octal Pipe taa fi ase wɔɔsom krataa a wɔde kyerɛw krataana afei ɔkyekyere nhwehwɛmu-ayɛ krado package twa ho hyia-a ɛkyerɛ sɛ ebia carbon steel line pipe no yɛ nea wogye tom anaasɛ sɛ ebia nkɔso (hayɛ den sohwɛ a emu yɛ den, ahwehwɛde ho sɔhwɛ a emu yɛ den, CRA/clad/lining) ho hia na wɔapene so. Wɔ EPC submittals ho no, yebetumi de alot-gyina traceability map so(ɔhyew/coil → paipu agyiraehyɛde → sɔhwɛ kyerɛwtohɔ), na fa nkrataa a wɔahyehyɛ (MTC + nhwehwɛmu/sɔhwɛ amanneɛbɔ) no hyia adwuma no ITP sɛnea ɛbɛyɛ a akraman no mfiridwuma mu nhwehwɛmu ne nneɛma a wɔayi no adi no renkyɛ esiane nkitahodi ahorow a ayera nti.

Sour Ɔsom Ɔmantam 3 (Severe Sour) .

Operator charts binom kyekyɛ sour severity mu ma ɛyɛ mpɔtam ahorow;Ɔmantam 3wɔtaa de di dwuma de gyina hɔ maɔsom a emu yɛ den a ɛyɛ akisikuruwɔ pH vs ppH2S mfonini ahorow so. Wɔ Ɔmantam 3 mu no, adetɔfoɔ taa yɛ nneɛma kwan ne ahwehwɛdeɛ kwan no mu den (hardness control + sour testing + stricter documentation) ɛfiri sɛ SSC margins sua

Sour-service pipe paw no taa yɛ nea aenvelope a wɔde di dwuma a wotumi susuw-ppH2S, pH, chlorides, ɔhyew, ne nsuo fa-sen sɛ ɛbɛyɛ adwuma no ho nkyerɛwde. Nsɛm tebea horow a ɛwɔ ase ha no kyerɛkyerɛ...afuw mu tebea horow ankasaa ɛma SSC/HIC asiane ne adetɔ ho ahwehwɛde ahorow kɔ so.

• Mframa a ɛwɔ nhyɛso kɛse-a ɛwɔ "ppm a ɛkɔ fam" H2S (ppH2S-driven severity):

H2S ppm koro no ara betumi ayɛ kɛse bere a nhyɛso nyinaa yɛ kɛse no, na ɛpia ppH2S kɔ ɔmantam bi a SSC margins no so tew mu. Mpɛn pii no, nnwuma ahorow no mu yɛ denhardness controlna wɔhwehwɛ adanse a ɛyɛ anika a ɛkyerɛ sɛ obi fata sen sɛ wɔde wɔn ho bɛto abasobɔde din nkutoo so.

• Mframa a ɛyɛ nsu / multiphase flow a nsu a ɛnyɛ hwee + chlorides:

Sɛ nsuo fã bi wɔ hɔ (nsuo a ɛyɛ nwini, nsuo a wɔayɛ, anaa tebea a ɛhaw adwene) a, chloride ne pH a ɛba fam ma hydrogen a ɛkɔ mu ne nsɛe dwumadie kɔ soro. Mpɛn pii no, adetɔ na ɛkyerɛHIC sohwɛ/sɔhwɛ (bere a ɛho hia) .ne nneɛma a ɛho tew ho ahwehwɛde ahorow a emu da hɔ.

• Nneɛma a atwa yɛn ho ahyia a pH sua-fi CO2 + nsu (carbonic acid), a H2S wɔ hɔ:

CO2 a wɔpete nsu mu no yɛ carbonic acid na ɛma nsɛe ntɛmntɛm; H2S nketewa mpo betumi adan huammɔdi kwan no akɔ SSC/HIC so. Adetɔfo taa de ka hogye a wogye tom denneennen wɔ sour resistance hone corrosion allowance/coating/lining gyinaesi ahorow a wɔakyekyere wɔ nsu amanneɛbɔ no ho.

• Ɔhyew kyinhyia ne shutdown/fi ase bere tiaa mu:

"Nkonimdi" pii nam bere tiaa mu nneɛma a ɛyɛ adwuma so na ɛba: ɔhyew a ɛsakra, nhyɛso a ɛkɔ soro, ne bere a ɛyɛ nsu/ɛyow. Mpɛn pii no, nsɛm a wɔakyerɛkyerɛ mu no mu yɛ denweld/HAZ a wɔde di dwuma, efisɛ hardness peaks ne local stress concentrators bɛyɛ nea ɛho hia kɛse wɔ sakre so.

• Po so/mpoano a wɔde nkyene a wɔde petepete so + wet–dry cycling (ne sour media):

Abɔnten so nneɛma a atwa yɛn ho ahyia de nhyɛso a ɛfa nsɛe ho (nkyene, nsuo, mmeae a nsuo petepete nsuo mu) ka asiane a ɛwɔ mu a ɛyɛ akisikuru no so. Adetɔ taa de sour ahwehwɛde ahorow bom necoating nhyehyɛe + nhwehwɛmu a wogye tom(akwamma gyinapɛn, ɔkwan a wɔfa so siesie).

• Nsu a wɔde yɛ acidic a efĩ wom (H2S, NH3, CO2, chlorides):

Refining/chemical lines tumi hu efĩ a wɔadi afra ne localized corrosion drivers, a ɛdanna gyinaesi no fi "standard line pipe" so kɔ "service-envelope qualified material." Ahwehwɛde ahorow taa bɛyɛ nkrataa-den:ahwehwɛde a ɛda adi pefee, hardness nnyinaso, ne traceability mapping.

Octal Pipe hyɛ no nsow:Wɔ sour-som nsɛmmisa mu no, Octal Pipe taa fi ase denam ɔsom envelope no a ɛsi so dua (ppH2S/pH/temperature/chlorides/water phase) na afei ɛde nneɛma kwan, sɔhwɛ scope (bere a wɔakyerɛ), ne nkrataa a wɔde ahyɛ mu no hyia ma ɛne mmarahyɛ gyinapɛn no hyia sɛnea ɛbɛyɛ a wɔbɛsan ahwɛ nea wɔapaw no-ayɛ krado-not guesswork.

Sour-service procurement taa sɛe wɔ mmeae abien koro no ara:mfiridwuma mu nhwehwɛmu(scope no mu nna hɔ) nesite a wɔayi no adi(adanse nnyɛ map nkɔ paipu no so). Octal Pipe di sour service ho dwuma sɛ controlled, review{1}}ready package a wɔasisi afi...ɔsom krataa a wɔde kyerɛw krataa-ppH2S, pH, ɔhyew, chlorides, ne nsuo fa-enti wɔde nneɛma kwan, sɔhwɛ kwan, ne nkrataa a wɔakyerɛw no hyia ansa na wɔafi ase ayɛ.

Wiase nhwɛso ankasa-a ɛkyerɛ baabi a saa kwan yi sie bere na ɛsan yɛ adwuma:

• Nhwɛsoɔ 1 - "ppm hwɛ sɛ ɛyɛ mmerɛ," nhyɛsoɔ ma ɛyɛ den:

Ebia amanneɛbɔ bi a ɛyɛ nsu bɛkaH2S=1,000 ppm na ɛwɔ hɔ, a sɛ wohwɛ a, ebetumi ayɛ te sɛ nea wotumi di ho dwuma. Nanso sɛ nhama no yɛ adwuma wɔ nhyɛso kɛse mu a,...H2S nhyɛso fã bi (ppH2S) .betumi ama ɔsom no akɔ nniso a ɛyɛ akisikuru a ɛyɛ den kɛse mu. Wɔ nsɛm yi mu no, wuranom taa yɛ ahwehwɛde ahorow no mu denhardness controlne ahwehwɛdeɛ nnyinasoɔ a ɛwɔ MR0175/ISO 15156 (anaasɛ adwumayɛfoɔ spec) ase. Octal Pipe frankaa eyi ntɛm na ɛdane nnuruyɛ amanneɛbɔ no kɔ adetɔ kwan a ebetumi atwam nhwehwɛmu-sen sɛ wɔbɛma nkɔmmɔbɔ no aba akyiri sɛ "ahwehwɛde a ɛyɛ anika a wɔnhwɛ kwan."

• Nhwɛsoɔ 2 - mframa a ɛyɛ nsuo / nsuo a wɔayɛ + chloride sesa huammɔdi kwan:

Sɛ nsuo a ɛnyɛ hwee wɔ hɔ na chlorides dɔɔso a, asiane no dan fi "general corrosion" kɔSSC/HIC nkate a ɛwɔ hɔ, na ebia adwuma no bɛhwehwɛHIC/SSC sɔhwɛ(anaasɛ gyinapɛn pɔtee a wɔde gye tom) mmom sen sɛ wɔbɛka nsɛm a ɛfa mmara a wodi so nyinaa ho. Octal Pipe de nneɛma ne sɔhwɛ nhyehyɛe no hyia ITP no ansa na wɔayɛ sɛnea ɛbɛyɛ a wobetumi ayi lot no adi wɔ adanse a wɔakyerɛw so sen sɛ wɔbɛkyerɛ ase wɔ asɛm-by-asɛm mu.

Nea Octal Pipe de ma ma sour-som nnwuma (wotumi te, ɛnyɛ generic):

• Ɔsom-envelope-driven nneɛma a wɔpaw:Carbon steel sour line pipe bere a wogye tom, a ɛwɔ controls a wɔhwehwɛ; na sɛ envelope no hwehwɛ a, Octal Pipe betumi ahyɛ nyansa sɛ wɔnyɛ nsakrae te sɛhardness control a ɛyɛ den, qualification scope a ɛyɛ katee, anaa CRA/clad/lining optionssɛ wobɛpra owura/EPC nhwehwɛmu no mu.
• Adanse a ɛfa ahwehwɛdeɛ ne nhwehwɛmu ho a ɛne PO/ITP hyia:HIC/SSC sɔhwɛ bere a wɔakyerɛ, UT/NDT sɛnea adwuma no kɛse te, ne welding/HAZ nneyɛe a wɔahyɛ so wɔ baabi a ɛfata-enti sour-som gye a wogye tom no yɛ nea kyerɛwtohɔ ahorow boa.
• Traceability a ɛtra ase wɔ site nokwasɛm mu:Lot-gyina map a ɛka bomɔhyew/coil → paipu agyiraehyɛde → sɔhwɛ kyerɛwtohɔ → MTC, a ɛtew sour-service delay a ɛtaa ba so: "pipe delivered but not released" esiane link ahorow a ayera wɔ nkrataa mu nti.

Di nkitaho mprempren

FAQ

 

 

Q: Dɛn ne sour service ntease wɔ oil & gas pipelines mu?

A:Sour service kyerɛ sɛ adwumayɛbea (ppH2S, pH, ɔhyew, chlorides, ne nsu fa) betumi ama hydrogen-a ɛfa ɔsɛe ho te sɛSSC/HIC na ɛwɔ hɔ, enti ɛsɛ sɛ honam fam ne gye a wogye tom di akyiMR0175 / ISO 15156 na ɛwɔ hɔahwehwɛde ahorow.

Q: Sour service H2S ppm - so ppm dɔɔso sɛ ɛbɛbu sɛnea emu yɛ den no atɛn?

A:Dabi, wɔtaa susuw sɛnea emu yɛ den ho denamH2S nhyɛso fã bi (ppH2S) ., ɛnyɛ ppm nkutoo; screen a mfaso wɔ so neppH2S=(H2S mole fã) × (nhyɛso nyinaa) ..

Asɛmmisa: Dɛn ne sour service material ahwehwɛde ma sour service pipe material?

A:Ɛsɛ sɛ sour-som PO ka mmarahyɛ gyinapɛn (MR0175/ISO 15156), theɔsom krataa a wɔde kyerɛw krataa(ppH2S/pH/T/chlorides/nsu), ne nneɛma a wɔde siw ano a wɔhwehwɛ te sɛanohyeto ahorow a ɛma ɛyɛ denneHIC/SSC sɔhwɛbere a wɔakyerɛ no.

Asɛmmisa: Dɛn ne sour service welding ahwehwɛde ahorow?

A:Sour service welding ahwehwɛde ahorow twe adwene si controlling soweld/HAZ a ɛyɛ den(mpɛn pii no ɛnam WPS/PQR controls te sɛ ɔhyew a wɔde hyɛ mu ne low-hydrogen adeyɛ) ne hardness verification a wɔyɛ bere a adwuma no ITP/spec hwehwɛ de tew SSC asiane so.

Adansedi nkrataa

 

CE Adansedi Krataa

ISO 9001 Adansedi krataa

API Q1 Adansedi krataa

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