2025-10-11T17:03:10+08:00 weekly 1.0 https://gd.octalpipe.com/ 2026-02-12T22:47:46+08:00 weekly 0.9 https://gd.octalpipe.com/company-honor 2026-02-12T22:47:48+08:00 weekly 0.9 https://gd.octalpipe.com/production-base 2026-02-12T22:48:22+08:00 weekly 0.9 https://gd.octalpipe.com/resources 2026-01-12T18:03:45+08:00 weekly 0.9 https://gd.octalpipe.com/after-sales 2026-01-12T18:02:19+08:00 weekly 0.9 https://gd.octalpipe.com/faq 2026-02-18T21:28:45+08:00 weekly 0.9 https://gd.octalpipe.com/video 2026-02-18T21:28:43+08:00 weekly 0.9 https://gd.octalpipe.com/download 2026-01-12T18:01:46+08:00 weekly 0.9 https://gd.octalpipe.com/project 2026-01-12T17:58:20+08:00 weekly 0.9 https://gd.octalpipe.com/stock 2026-02-12T23:12:00+08:00 weekly 0.9 https://gd.octalpipe.com/about-us 2026-02-12T22:59:40+08:00 weekly 0.9 https://gd.octalpipe.com/contact-us 2026-02-12T23:12:02+08:00 weekly 0.9 https://gd.octalpipe.com/inquiry 2026-02-12T23:12:05+08:00 weekly 0.9 https://gd.octalpipe.com/newslist-1 2026-02-12T23:19:29+08:00 weekly 0.9 https://gd.octalpipe.com/info/ 2026-02-12T23:23:00+08:00 weekly 0.9 https://gd.octalpipe.com/products 2026-02-12T18:02:51+08:00 weekly 1.0 https://gd.octalpipe.com/steel-pipe/ 2026-02-12T18:04:53+08:00 weekly 1.0 https://gd.octalpipe.com/valve/ 2026-02-12T19:01:25+08:00 weekly 1.0 https://gd.octalpipe.com/octg-casing-and-tubing/ 2026-02-12T19:21:50+08:00 weekly 1.0 https://gd.octalpipe.com/coating-pipe/ 2026-02-12T19:22:08+08:00 weekly 1.0 https://gd.octalpipe.com/coating-pipe/concrete-weight-coating/ 2026-02-12T19:22:37+08:00 weekly 1.0 https://gd.octalpipe.com/steel-plates/ 2026-02-12T19:23:12+08:00 weekly 1.0 https://gd.octalpipe.com/coating-pipe/galvanized-steel-pipe/ 2026-02-12T19:32:05+08:00 weekly 1.0 https://gd.octalpipe.com/coating-pipe/internal-coating/ 2026-02-12T19:34:21+08:00 weekly 1.0 https://gd.octalpipe.com/sucker-rods/ 2026-02-12T19:34:29+08:00 weekly 1.0 https://gd.octalpipe.com/drill-pipes/ 2026-02-12T19:35:53+08:00 weekly 1.0 https://gd.octalpipe.com/coating-pipe/external-coating/ 2026-02-13T01:49:58+08:00 weekly 1.0 https://gd.octalpipe.com/steel-pipe-fittings/ 2026-02-13T18:22:57+08:00 weekly 1.0 https://gd.octalpipe.com/steel-pipe-fittings/pipe-fitting/ 2026-02-13T22:30:14+08:00 weekly 1.0 https://gd.octalpipe.com/steel-pipe-fittings/flange/ 2026-02-18T08:47:39+08:00 weekly 0.9 https://gd.octalpipe.com/steel-pipe-production-lines/ 2026-03-13T09:18:53+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/api-5l-seamless-pipe.html 2026-03-13T09:21:10+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/ssaw-welded-steel-pipe.html 2026-03-13T09:20:27+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/seamless-steel-pipe.html 2026-03-13T09:20:47+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/carbon-steel-pipe.html 2026-03-13T09:34:06+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/lsaw-welded-steel-pipe.html 2026-03-13T10:00:36+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/erw-welded-steel-pipe.html 2026-03-13T09:20:47+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/stainless-steel-pipe.html 2026-03-13T10:21:53+08:00 weekly 0.8 https://gd.octalpipe.com/octg-casing-and-tubing/tubing.html 2026-03-13T09:20:53+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/sour-service-special-applications.html 2026-03-13T09:19:13+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/boiler-pipe.html 2026-03-13T09:19:54+08:00 weekly 0.8 https://gd.octalpipe.com/steel-plates/steel-plate.html 2026-03-13T09:19:46+08:00 weekly 0.8 https://gd.octalpipe.com/steel-plates/steel-coil.html 2026-03-13T09:58:41+08:00 weekly 0.8 https://gd.octalpipe.com/octg-casing-and-tubing/casing.html 2026-03-13T09:20:07+08:00 weekly 0.8 https://gd.octalpipe.com/valve/wellhead-and-christmas-tree.html 2026-03-13T10:01:15+08:00 weekly 0.8 https://gd.octalpipe.com/sucker-rods/sucker-rod.html 2026-03-13T09:20:14+08:00 weekly 0.8 https://gd.octalpipe.com/drill-pipes/api-5dp-drill-pipe.html 2026-03-13T09:18:57+08:00 weekly 0.8 https://gd.octalpipe.com/sucker-rods/high-strength-sucker-rod.html 2026-03-13T10:01:34+08:00 weekly 0.8 https://gd.octalpipe.com/valve/api-6d-valve-and-pipeline-valve.html 2026-03-13T10:00:49+08:00 weekly 0.8 https://gd.octalpipe.com/drill-pipes/drill-pipe.html 2026-03-13T09:20:20+08:00 weekly 0.8 https://gd.octalpipe.com/octg-casing-and-tubing/drilling-riser.html 2026-03-13T09:20:31+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/chrome-molypipe-high-preformance-alloy-steel.html 2026-03-13T09:19:36+08:00 weekly 0.8 https://gd.octalpipe.com/octg-casing-and-tubing/casing-and-tubing-api-5ct.html 2026-03-13T09:20:57+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/cra-clad-and-lined-pipe.html 2026-03-13T09:20:28+08:00 weekly 0.8 https://gd.octalpipe.com/octg-casing-and-tubing/conductor-pipe.html 2026-03-13T09:59:35+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/fbe-internal-coating-for-octg-tubing-and.html 2026-03-13T10:02:16+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/pe-pipe.html 2026-03-13T09:20:22+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-production-lines/lsaw-steel-pipe-production-line.html 2026-03-13T10:01:08+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe/sanitary-pipe.html 2026-03-13T10:00:35+08:00 weekly 0.8 https://gd.octalpipe.com/steel-plates/round-bar.html 2026-03-13T09:59:56+08:00 weekly 0.8 https://gd.octalpipe.com/steel-plates/4100mm-heavy-and-wide-plate.html 2026-03-13T09:19:30+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/hammer-unions.html 2026-03-13T10:20:16+08:00 weekly 0.8 https://gd.octalpipe.com/octg-casing-and-tubing/insulated-tubing.html 2026-03-13T09:20:29+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-production-lines/ssaw-pipe-production-line.html 2026-03-13T09:20:36+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-production-lines/erw-pipe-production-line.html 2026-03-13T09:21:16+08:00 weekly 0.8 https://gd.octalpipe.com/steel-plates/china-steel-silo.html 2026-03-13T09:19:48+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/pipe-fitting/socket-weld-pipe-fittings.html 2026-03-13T10:20:13+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/pipe-fitting/threaded-pipe-fittings.html 2026-03-13T09:19:57+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/flange/socket-weld-flange.html 2026-03-13T10:19:38+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/concrete-weight-coating/pipeline-concrete-weight-coating-cwc.html 2026-03-13T09:18:56+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/internal-coating/internal-fbe-coating-pipe.html 2026-03-13T09:59:14+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/galvanized-steel-pipe/hot-dip-galvanizing.html 2026-03-13T09:19:13+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/concrete-weight-coating/anode-installation.html 2026-03-13T09:19:50+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/external-coating/fbe-coating-pipe.html 2026-03-13T09:19:45+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/external-coating/3lpp-coating-pipe.html 2026-03-13T09:18:56+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/external-coating/pu-insulated-pipe.html 2026-03-13T10:36:58+08:00 weekly 0.8 https://gd.octalpipe.com/coating-pipe/external-coating/3lpe-coating-pipe.html 2026-03-13T09:20:11+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/pipe-fitting/clad-pipe-fittings.html 2026-03-13T09:19:22+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/flange/weld-neck-flange.html 2026-03-13T10:00:50+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/pipe-fitting/butt-weld-pipe-fittings.html 2026-03-13T09:19:15+08:00 weekly 0.8 https://gd.octalpipe.com/steel-pipe-fittings/flange/threaded-flange.html 2026-02-16T00:03:47+08:00 weekly 0.9 https://gd.octalpipe.com/newslist-17748501412258816-1 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/theoretical-weight-of-stainless-steel-pipe-17760425228264448.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/stainless-steel-pipe-composition-17760420598129664.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/applications-of-stainless-steel-pipe-17760420599899136.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/uses-of-stainless-steel-pipes-17760414962148352.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/applications-of-stainless-steel-pipes-17760425370051584.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/the-functions-of-oil-casing-17760420566279168.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/the-importance-of-oil-casing-and-tubing-in-oil-17760425181127680.html 2026-02-24T09:54:07+08:00 weekly 0.8 https://gd.octalpipe.com/news/flange-welding-quality-17760415089845248.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/what-materials-are-needed-for-flange-manufactu-17760429318530048.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/basic-structure-of-galvanized-pipe-17760429115401216.html 2026-02-24T09:58:49+08:00 weekly 0.8 https://gd.octalpipe.com/news/how-to-calculate-steel-coil-weight-17760420668400640.html 2026-02-24T09:54:07+08:00 weekly 0.8 https://gd.octalpipe.com/news/steel-coil-characteristics-17760415054373888.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/the-function-of-the-sucker-rod-17760420566000640.html 2026-02-24T09:54:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/sucker-rod-usage-precautions-17760415115420672.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/how-to-use-a-sucker-rod-to-pump-oil-17760420707656704.html 2026-02-24T10:16:12+08:00 weekly 0.8 https://gd.octalpipe.com/news/key-features-of-drill-pipe-17760439210501120.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/drill-pipe-material-standards-17760415011464192.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/valve-introduction-17760415155659776.html 2026-02-24T09:58:22+08:00 weekly 0.8 https://gd.octalpipe.com/news/valve-cleaning-procedures-17760419415073792.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/domestic-valve-status-17760447795028992.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/news-n-17760415060452352.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/news-o-17760420544144384.html 2026-02-24T10:02:50+08:00 weekly 0.8 https://gd.octalpipe.com/news/news-e-17760425203917824.html 2026-02-16T00:04:40+08:00 weekly 0.8 https://gd.octalpipe.com/news/company-announcement-participation-17748502511821824.html 2026-02-18T10:53:33+08:00 weekly 0.8 https://gd.octalpipe.com/news/octal-pipe-updates-carbon-steel-pipe-inventory-17751970677105664.html 2026-02-18T10:54:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/mexico-s-plan-to-impose-high-tariffs-on-chines-17751971140658176.html 2026-02-18T10:54:08+08:00 weekly 0.8 https://gd.octalpipe.com/news/company-announcement-participation-in-the-17751970936448000.html 2026-02-18T10:54:10+08:00 weekly 0.8 https://gd.octalpipe.com/news/company-announcement-participation-in-seaisi-17751971275547648.html 2026-02-18T10:54:18+08:00 weekly 0.8 https://gd.octalpipe.com/news/octal-pipe-accelerates-digital-transformation-17751971318637568.html 2026-02-18T23:57:14+08:00 weekly 0.8 https://gd.octalpipe.com/news/aktobe-neftekhim-2025-octal-pipe-exhibition-17752742054257664.html 2026-02-18T23:57:30+08:00 weekly 0.8 https://gd.octalpipe.com/news/octal-pipe-at-adipec-2025-advancing-material-17752742368633856.html 2026-02-18T23:57:17+08:00 weekly 0.8 https://gd.octalpipe.com/news/shipment-to-mexico-octal-pipe-delivers-api-17752742075065344.html 2026-02-18T23:57:37+08:00 weekly 0.8 https://gd.octalpipe.com/news/finished-product-spot-check-austenitic-stainl-17752742334309376.html 2026-02-24T09:59:02+08:00 weekly 0.8 https://gd.octalpipe.com/news/casing-delivery-to-halliburton-api-5ct-seamle-17760420676232192.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/after-export-licenses-return-steel-exports-mo-17760420651279360.html 2026-06-07T22:08:06+08:00 weekly 0.8 https://gd.octalpipe.com/news/octal-pipe-new-year-celebration-employee-bir-17760424846337024.html 2026-02-24T10:10:02+08:00 weekly 0.8 https://gd.octalpipe.com/news/astm-carbon-steel-fittings-flanges-seamless-17760432811893760.html 2026-02-24T09:58:33+08:00 weekly 0.8 https://gd.octalpipe.com/news/octal-pipe-director-kevin-wen-joined-anyang-g-17760420022592512.html 2026-02-15T23:48:44+08:00 weekly 0.9 https://gd.octalpipe.com/info/17748486473163776/ 2026-02-15T23:49:03+08:00 weekly 0.9 https://gd.octalpipe.com/info/17748486877340672/ 2025-12-29T17:01:16+08:00 weekly 0.8 https://gd.octalpipe.com/info/precision-304-and-316-stainless-steel-tubes-17760430344807424.html 2025-12-25T14:30:19+08:00 weekly 0.8 https://gd.octalpipe.com/info/characteristics-of-stainless-steel-pipe-17760428611970049.html 2025-12-26T15:41:16+08:00 weekly 0.8 https://gd.octalpipe.com/info/applications-and-advantages-of-galvanized-pipe-17760424674403328.html 2026-02-24T09:58:35+08:00 weekly 0.8 https://gd.octalpipe.com/info/daily-valve-maintenance-17760420075742208.html 2025-12-25T14:20:00+08:00 weekly 0.8 https://gd.octalpipe.com/info/valve-operation-and-maintenance-17760420067337216.html 2025-12-26T17:05:56+08:00 weekly 0.8 https://gd.octalpipe.com/info/flange-connection-methods-17760419508462592.html 2026-02-24T09:58:09+08:00 weekly 0.8 https://gd.octalpipe.com/info/do-stainless-steel-pipes-expand-and-contract-w-17760419382518784.html 2025-12-30T09:17:46+08:00 weekly 0.8 https://gd.octalpipe.com/info/how-to-make-pipe-connection-and-sealing-more-r-17760414531249152.html 2025-12-26T10:36:16+08:00 weekly 0.8 https://gd.octalpipe.com/info/how-the-sucker-rod-works-17760414461944832.html 2025-12-26T10:19:55+08:00 weekly 0.8 https://gd.octalpipe.com/info/drill-pipe-steel-grade-strength-17760414419756032.html 2025-12-25T16:59:08+08:00 weekly 0.8 https://gd.octalpipe.com/info/valve-installation-requirements-17760414379385856.html 2025-12-29T09:49:34+08:00 weekly 0.8 https://gd.octalpipe.com/info/oil-casing-and-tubing-production-process-and-d-17760414318928896.html 2026-02-24T09:52:50+08:00 weekly 0.8 https://gd.octalpipe.com/info/composition-of-oil-casing-17760414235403264.html 2025-12-25T14:31:08+08:00 weekly 0.8 https://gd.octalpipe.com/info/functions-of-each-layer-in-a-stainless-steel-p-17760414198522880.html 2025-12-26T11:57:31+08:00 weekly 0.8 https://gd.octalpipe.com/info/steel-coil-classification-17760414131971072.html 2025-12-25T14:29:39+08:00 weekly 0.8 https://gd.octalpipe.com/info/characteristics-of-stainless-steel-pipes-17760414119732224.html 2026-02-16T00:06:04+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a179-asme-sa179-heat-exchanger-tubes-17748504130806784.html 2026-02-16T00:05:01+08:00 weekly 0.8 https://gd.octalpipe.com/info/inconel-625-nickel-alloy-625-uns-n06625-17748502898336768.html 2026-02-16T00:04:54+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a335-p22-pipe-specification-chrome-moly-17748502398264320.html 2026-02-16T00:02:23+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a335-p11-seamless-alloy-steel-pipe-for-hi-17748499892773888.html 2026-02-16T00:01:42+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a335-p9-alloy-steel-pipe-17748499353904128.html 2026-02-15T23:56:26+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a213-t11-tubing-specification-17748494453564416.html 2025-12-22T17:29:15+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a53-grade-a-and-b-steel-pipe-17748494218699776.html 2026-02-15T23:56:29+08:00 weekly 0.8 https://gd.octalpipe.com/info/316l-316ti-316hi-stainless-steel-pipe-17748492719760384.html 2026-02-15T23:54:13+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a333-grade-6-pipe-17748492092613632.html 2026-02-15T23:53:14+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a500-grade-c-pipe-specification-17748490707739648.html 2026-02-15T23:52:19+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a252-grade-3-pipe-pileastm-a252-grade-3-p-17748490200507392.html 2026-02-15T23:51:18+08:00 weekly 0.8 https://gd.octalpipe.com/info/seamless-steel-pipe-engineered-for-high-inte-17748489306383360.html 2026-02-15T23:50:08+08:00 weekly 0.8 https://gd.octalpipe.com/info/what-is-a-pipeline-understanding-the-lifeline-17748487961289728.html 2026-02-16T00:18:46+08:00 weekly 0.8 https://gd.octalpipe.com/info/incoloy-825-nickel-alloy-825-uns-n08825-17748517160969216.html 2026-02-16T00:11:41+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a335-p5-seamless-alloy-steel-pipe-17748509404128256.html 2026-02-18T23:57:35+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a672-pipe-standard-overview-17752742428779520.html 2026-02-18T23:57:33+08:00 weekly 0.8 https://gd.octalpipe.com/info/cased-hole-vs-openhole-when-to-use-slotted-li-17752742418228224.html 2026-02-18T10:55:09+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a213-sa213-t9-t11-t22-t91-alloy-and-st-17751973908456448.html 2026-02-18T10:55:11+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a213-t9-alloy-steel-tubing-17751973096121344.html 2026-02-18T10:56:11+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a213-t5-alloy-steel-tubing-17751972863779840.html 2026-02-18T10:56:47+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a312-stainless-steel-pipe-17751972568589312.html 2025-12-18T11:46:08+08:00 weekly 0.8 https://gd.octalpipe.com/info/api-5l-x70-welded-line-pipe-specification-17751972210304000.html 2026-02-18T10:55:21+08:00 weekly 0.8 https://gd.octalpipe.com/info/astm-a106-grade-b-seamless-pipe-17751971433784320.html 2026-02-18T22:33:52+08:00 weekly 0.8 https://gd.octalpipe.com/info/how-do-you-choose-the-right-galvanized-steel-p-17752659411772416.html 2026-02-18T11:09:40+08:00 weekly 0.8 https://gd.octalpipe.com/info/api-5l-x65-welded-line-pipe-17751989025170432.html 2026-02-18T22:19:36+08:00 weekly 0.8 https://gd.octalpipe.com/info/when-do-you-need-premium-connections-17752648039359488.html