{"id":32,"date":"2026-10-05T20:12:05","date_gmt":"2026-10-05T12:12:05","guid":{"rendered":"http:\/\/runda-hitech.com\/?page_id=32"},"modified":"2026-10-05T21:09:35","modified_gmt":"2026-10-05T13:09:35","slug":"quality","status":"publish","type":"page","link":"https:\/\/runda-hitech.com\/index.php\/quality\/","title":{"rendered":"Quality, Inspection &#038; Documentation"},"content":{"rendered":"\n<div class=\"wp-block-cover alignfull rlok-hero\" style=\"min-height:430px;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\"><\/span><img decoding=\"async\" class=\"wp-block-cover__image-background\" alt=\"\" src=\"http:\/\/runda-hitech.com\/wp-content\/uploads\/2026\/10\/r-lok-hero-background.jpg\" data-object-fit=\"cover\"\/><div class=\"wp-block-cover__inner-container has-global-padding is-layout-constrained wp-block-cover-is-layout-constrained\">\n<h1 class=\"wp-block-heading\">Quality, Inspection &amp; Documentation<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">R-LOK valves, fittings, regulators, filters and hose assemblies ship with a defined inspection and documentation package. As your sourcing partner, CHANGSHA RUNDA HITECH CO., LTD. supplies R-LOK goods through qualified production partners. Each item is selected against your data and checked before packing. Documents are traceable to the batch shipped.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"\/index.php\/contact\/\">Request a quote<\/a><\/div>\n\n<div class=\"wp-block-button is-style-outline\"><a class=\"wp-block-button__link wp-element-button\" href=\"\/index.php\/products\/\">Browse products<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group rlok-body has-global-padding is-layout-constrained wp-container-core-group-is-layout-b8954cbe wp-block-group-is-layout-constrained\" style=\"border-radius:0px\">\n<p class=\"wp-block-paragraph\"><span class=\"rlok-fallback-nav\"><a href=\"\/index.php\/products\/\">Products<\/a> &nbsp;&middot;&nbsp; <a href=\"\/index.php\/applications\/\">Applications<\/a> &nbsp;&middot;&nbsp; <a href=\"\/index.php\/quality\/\">Quality<\/a> &nbsp;&middot;&nbsp; <a href=\"\/index.php\/resources\/\">Resources<\/a> &nbsp;&middot;&nbsp; <a href=\"\/index.php\/about\/\">About<\/a> &nbsp;&middot;&nbsp; <a href=\"\/index.php\/contact\/\">Contact<\/a><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"rlok-bc\"><a href=\"\/index.php\/\">Home<\/a> &rsaquo; <strong>Quality<\/strong><\/span><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-6ac5c474 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Key features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NPT threads gauged to ASME B1.20.1, 60 degree form, 1:16 taper.<\/li>\n\n<li>316 stainless male NPT end rated 8,000 psig (551 bar) at 1\/4 in.<\/li>\n\n<li>Material certificates and dimensional inspection reports supplied on request.<\/li>\n\n<li>Heat numbers recorded on mill certificates and matched to the delivered batch.<\/li>\n\n<li>SGS, BV, Intertek or TUV inspection arranged at our packing location.<\/li>\n\n<li>Pressure test and leak test reports when the purchase order states the method.<\/li>\n<\/ul>\n<\/div>\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Thread forms supplied<\/td><td>NPT, ISO tapered and ISO parallel (G, RP, PF, BSPP)<\/td><\/tr><tr><td>Thread angle and taper<\/td><td>NPT 60 degrees, 1:16; ISO tapered 55 degrees, 1:16 per ISO 7-1<\/td><\/tr><tr><td>Thread size range<\/td><td>1\/16 in to 2 in, 27 to 11.5 threads per inch<\/td><\/tr><tr><td>NPT, 316 stainless male<\/td><td>11,000 psig (757 bar) 1\/16 in, 3,900 (268 bar) 2 in<\/td><\/tr><tr><td>NPT, 316 stainless female<\/td><td>6,700 (460 bar) 1\/16in, 6,600 (454 bar) 1\/4in, 3,900 (268 bar) 2in<\/td><\/tr><tr><td>NPT, brass male<\/td><td>5,500 (378 bar) 1\/16 in and 1,900 (130 bar) 2 in<\/td><\/tr><tr><td>Body materials<\/td><td>brass, 316 and 316L stainless steel, higher-alloy options on request<\/td><\/tr><tr><td>Tube fitting make-up<\/td><td>1-1\/4 turns beyond finger-tight up to 3\/16 in and 4 mm, 3\/4 turn above<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">How we check your order<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Every enquiry starts with a specification. We record fluid, working pressure, working temperature, connection type, size and material, then match them against the ratings of the family you selected. Where two sizes or seat materials apply, we state which one the quoted pressure covers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before packing, goods pass three checks: identity against the purchase order, dimensions, and material review of heat number and mill certificate for the delivered batch. Dimensions cover thread form and gauge, hex, bore and end-to-end length.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Documents that travel with goods<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The standard export package holds a commercial invoice, packing list, certificate of origin on request, and the inspection record for the items shipped. Material certificates and dimensional inspection reports come on request, matched to the heat number of the delivered batch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pressure test and leak test reports, hardness or surface roughness records, and special cleaning certificates can be arranged when the purchase order states the requirement and the test method. SGS, BV, Intertek, TUV or your own inspector can attend our packing location.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Standards, traceability and ratings<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Batch-level traceability from mill certificate to individual valve or fitting is the normal route for oil and gas, petrochemical and pharmaceutical orders. Full material traceability is on request. General industrial orders can be supplied to model and size only, which keeps the price lower.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Catalogue pressures are referenced to ANSI\/ASME B31.3 at ambient temperature and are de-rated for working temperature and for the seat or seal material selected. Ask for the rating that applies to the size, end connection and material on your order.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Standards referenced:<\/strong> NPT threads referenced to ASME B1.20.1 and SAE AS71051; ISO tapered threads referenced to ISO 7-1, EN 10226-1, BS 21, DIN 2999 and JIS B0203; ISO parallel threads (G, RP, PF, BSPP) referenced to ISO 228-1, DIN 228-1, JIS B0202 and BS 2779.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Typical duties:<\/strong> Oil and gas instrumentation and sampling systems; Petrochemical and chemical process plants; Semiconductor and high-purity gas panels; Pharmaceutical and clean-duty process lines; Hydrogen projects and clean energy; Oxygen service with specified degreasing and bagging.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What documents can you supply with a shipment?<\/summary>\n<p class=\"wp-block-paragraph\">As standard: invoice, packing list and the inspection record for the items shipped. On request: material certificates with heat numbers, dimensional inspection reports, pressure and leak test reports, and certificate of origin. Send your project document list with the enquiry.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can we send an inspector or use a third-party agency?<\/summary>\n<p class=\"wp-block-paragraph\">Yes. We arrange SGS, BV, Intertek, TUV or your own inspector at our packing location, and issue the inspection invitation with the packing date so your surveyor can plan attendance. State any inspection requirement on the purchase order.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How do BSPT and BSPP threads differ?<\/summary>\n<p class=\"wp-block-paragraph\">BSPT and ISO tapered threads (R, R1, R2, Rc, RT, PT, ZG) use a 55 degree angle and 1:16 taper, sealing on the thread. BSPP and ISO parallel threads (G, RP, PF) seal on a bonded washer or O-ring face. The two are not interchangeable.<\/p>\n<\/details>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull rlok-cta has-global-padding is-layout-constrained wp-container-core-group-is-layout-c4390f02 wp-block-group-is-layout-constrained\" style=\"border-radius:0px\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-b097105c wp-block-group-is-layout-constrained\" style=\"border-radius:0px\">\n<h2 class=\"wp-block-heading\">Request a quote or technical clarification<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Send us the model, size, material and quantity you need &mdash; or a photo of the existing part. We reply with a quotation, availability and the applicable documents, usually within one working day.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"mailto:nimo@runda-hitech.com\">Email nimo@runda-hitech.com<\/a><\/div>\n\n<div class=\"wp-block-button is-style-outline\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/wa.me\/8613657416007\">WhatsApp +86 136 5741 6007<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Tel \/ WhatsApp: +86 136 5741 6007 &middot; Email: nimo@runda-hitech.com<\/p>\n<\/div>\n<\/div>\n\n\n\n<style>img{max-width:100%;height:auto}.wp-block-table{max-width:100%}.rlok-bc{display:block;font-size:13px;letter-spacing:.01em;color:#5a6b7d;margin:0 0 26px}.rlok-bc a{color:#0b2545;text-decoration:none}.rlok-bc a:hover{color:#c8102e;text-decoration:underline}.rlok-bc strong{color:#0b2545}.rlok-fallback-nav{display:block;border-bottom:1px solid #dde3ea;padding-bottom:12px;margin:0 0 18px;font-size:14.5px;font-weight:600}.rlok-fallback-nav a{color:#0b2545;text-decoration:none}.rlok-fallback-nav a:hover{color:#c8102e;text-decoration:underline}@media (max-width:782px){.rlok-hero{min-height:330px!important;padding-left:18px!important;padding-right:18px!important}.rlok-hero h1{font-size:26px;line-height:1.22}.rlok-hero p{font-size:15.5px}.rlok-body{padding:30px 18px 12px!important}.rlok-cta{padding:38px 18px!important}.rlok-cta h2{font-size:22px}.rlok-bc{font-size:12.5px;margin-bottom:18px}.wp-block-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}.wp-block-table table{min-width:520px;font-size:13px}.wp-block-table th,.wp-block-table td{padding:7px 9px}.wp-block-columns{gap:1.1rem;margin-bottom:1.3rem}.wp-block-button{width:100%}.wp-block-button__link{width:100%;text-align:center}h2.wp-block-heading{font-size:22px}h3.wp-block-heading{font-size:19px}.wp-block-details{padding:12px 14px}}<\/style><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"http:\/\/runda-hitech.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Quality\", \"item\": \"http:\/\/runda-hitech.com\/quality\/\"}]}<\/script>\n\n\n<!-- VERIFY BEFORE PUBLISHING: Confirm which quality management system certificates, if any, the company itself holds. Do not publish ISO 9001, CE, PED, ATEX, API or similar claims until the certificate number, issuing body and scope are available; the page currently makes no such claim. | Confirm whether the company operates its own inspection area, gauge set and pressure test bench, or whether all inspection and testing is performed by the production partners it sources from. The wording used here attributes inspection to the supply chain and must be corrected if in-house capability is confirmed. | Confirm the exact list of documents issued free of charge versus at extra cost, and the price and lead time impact of third-party inspection, pressure testing and special cleaning. | Confirm real lead times for stocked and made-to-order items so the FAQ answer can quote figures instead of a general statement. | Confirm whether the production partners can provide high-purity cleaning, oxygen service cleaning and double bagging, and for which sizes and materials. | Confirm which third-party inspection agencies the company can actually book locally, and whether inspection at the production partner's site or at the packing location is offered. | Confirm whether any pressure or leak test reports would come from the production partner's test bench, and under what standard the tests are performed, so the wording can be made specific. -->\n\n<!-- build: slug=quality type=corporate keywords=instrumentation valve supplier China, tube fittings supplier export, material certificate valve fitting, NPT thread inspection ASME B1.20.1, BSPT BSPP adapter supplier, 316L instrument fittings documentation, third party inspection SGS BV valves, pressure test report tube fittings, instrumentation valves export packing, oxygen clean fittings supplier -->","protected":false},"excerpt":{"rendered":"<p>Inspection and documentation for R-LOK valves and fittings: material certs, dimensional reports, NPT per ASME B1.20.1. Ask for your document list.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-32","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/pages\/32","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/comments?post=32"}],"version-history":[{"count":8,"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/pages\/32\/revisions"}],"predecessor-version":[{"id":395,"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/pages\/32\/revisions\/395"}],"wp:attachment":[{"href":"https:\/\/runda-hitech.com\/index.php\/wp-json\/wp\/v2\/media?parent=32"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}